MGMT 3720 – Organizational Behavior EXAM 3

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MGMT 3720 – Organizational Behavior EXAM 3

(MGMT 3720 – Organizational Behavior EXAM 3) (CH. 9, 10, 11, & 12)

MGMT 3720 – Organizational Behavior EXAM 3

Question 1

1.  While discussing their marketing campaign for a new product, the members of the cross-functional team responsible for Carver Inc. realized that a couple of changes relating to their prior plan would be beneficial. The offer of a franchising that had earlier been brushed off by the company head was discussed thoroughly and it was decided that it would be implemented on a trial basis initially, and on full scale if found to work well. From the information provided, it can be concluded that this cross-functional team has a high degree of ________.

Answer

reflexivity
uncertainty
diversity
conformity
demography

Question 2

1.  Max Hiller was recently hired by Sync, a consumer goods company. During his first meeting with the sales team, Max impressed upon his team that work performance is the only criterion he would use to evaluate them. To help them perform well and meet their targets, he pushed his team to work extra hours. He also gave very clear instructions to each member regarding their job responsibilities and continually verified if they were meeting their targets. Which of the following, if true, would weaken Max’s approach? (MGMT 3720 – Organizational Behavior EXAM 3)

Answer

Sales figures for the region that Max’s team is responsible for have improved in the last quarter.
Max is leading many new employees who have joined his team directly after training.
Max’s sales team is comprised of independent and experienced employees who are committed to their jobs.
Max’s team functions in a sluggish manner and picks up pace only a week or so before the monthly operations cycle meetings.
Max’s team does not display high levels of cohesiveness and members fail to coordinate with each other.

Question 3

1.  Which of the following statements is true regarding the effect of group cohesiveness and performance norms on group productivity? (MGMT 3720 – Organizational Behavior EXAM 3)

Answer

When both cohesiveness and performance norms are high, productivity will be high.
The productivity of the group is affected by the performance norms but not by the cohesiveness of the group.
If cohesiveness is high and performance norms are low, productivity will be high.
When cohesiveness is low and performance norms are also low, productivity will be high.
If cohesiveness is low and performance norms are high, productivity will be low.

Question 4

1.  Neutralizers make it impossible for leader behavior to make any difference to follower outcomes.

Answer

True

False

Question 5

1.  Communication includes both the transfer and the understanding of meaning.

Answer

True

False

Question 6

1.  According to the path-goal theory, directive leadership is likely to be welcomed and accepted by employees with high ability or considerable experience.

Answer

True

False

Question 7

1.  Before buying her new phone, Gina listed the various requirements her new phone must meet. As a wedding planner, much of her work revolved around using e-mail to forward pictures of locations, designs, and food arrangements that she could categorize by themes and prices. She required a phone with high storage capacity, speedy Internet, and easy-to-use methods to organize and save content. After listing these requirements, she fixed a budget and began surveying phones online. She also obtained information from friends. In a week’s time, Gina had shortlisted three models that suited her needs and was ready to make the final choice. Gina used ________ to arrive at this decision.

Answer

controlled processing
heuristical processing
selective processing
superficial processing
automatic processing

Question 8

1.  Aaron Dias was working on the last shift for the day at All Needs, a retail store owned by an Asian man, when he opened the cash register and stole some money thinking that nobody would witness him stealing. However, one of the customer attendants watched him steal the money and reported it to the manager the next day, following which Aaron was terminated. Subsequently, the manager became extremely strict with all his Caucasian employees and was often heard abusing them saying “you guys are all the same.” This scenario depicts ________.

Answer

social loafing
in-group favoritism
groupthink
contrast bias
contrast bias

Question 9

1.  Which of the following is true with regard to the impact of diversity on team effectiveness?

Answer

High levels of diversity among team members benefit the group from the stage of forming.
Race and gender diversity bear the highest positive impact on team performance.
Cultural diversity serves as an asset for tasks that call for a variety of viewpoints once the team has worked out its differences.
Leadership has a negligible role to play in diverse teams because the members manage themselves autonomously.
Elements of diversity are undesirable as they interfere with team processes in the long run.

Question 10

1.  The ability to influence a group toward the achievement of a vision or set of goals can arise outside the formal structure of the organization.

True

False

Question 11

1.   ABL is one of the largest consumer goods companies in the country and it recently held its annual conference where members of all regional divisions were invited. Since the company is vast and rarely finds all its employees together in such a manner, it used this opportunity to present to them certain new ideas they had regarding various aspects of their functioning. Large meetings with each regional team were held to provide them with information about the proposed changes and to obtain their anonymous votes through computers. This helped the company speed up the decision-making process and consolidate the results immediately. Which of the following group decision techniques did ABL use here?

Answer

nominal groups approach
heuristics and algorithm approach
electronic meeting approach
reference groups approach
brainstorming

Question 12

1.  When the middle-level manager of the production department at Wilson Works was laid off, many employees who worked under him became apprehensive about their job security. They were aware of the current trend toward laying-off employees in the economy. The termination of their manager combined with the fact that their division had performed only moderately well in the last two quarters led the employees to believe that they were at a high risk of losing their jobs as well. Which of the following, if true, would weaken the argument that the production manager should hold face-to-face meetings to assure the employees in the production division?

Answer

Rumors had spread about impending lay-offs at Wilson Works.
Wilson Works had a strong formal communication network in place.
The middle level manager supervised over five hundred employees.
The employees had serious concerns over job security.
The company had no fixed policy with regard to rightsizing employees.

 

Question 13

1.  Bonnie Patterson is a manager for seven years at Wayne and Watson, a legal consultancy firm. A good part of her work day involves holding meetings and she likes to get work on a time-bound schedule. For this reason, members of her team receive the agenda at the beginning of the meeting, followed by some time to contemplate over the issue at hand individually. Subsequently, the team members present their ideas one after another, the group discusses them together, and lastly, a ranking is done to choose the most favored idea. This represents the ________ approach of group decision making.

Answer

brainstorming
interacting
nominal group
reference group
Groupthink

 

Question 14

1.  Jason Jones has been asked to assemble an eight-member self-managed work team of experienced employees to work on a project that combines the functional areas of research, production, marketing, and distribution. Jason is apprehensive about managing a team so large; he knows from prior experience that larger teams do not always result in greater productivity. Jason has also been informed by the management that this team is being established as the project must progress according to the predetermined timeline. The work lagging behind by one division will cause a cumulative delay in all the successive stages of the project’s execution. Jason plans to implement a group-based incentive that he feels would motivate each of the team members to work efficiently. Which of the following is an assumption made by Jason in implementing this plan?

Answer

Since the team is comprised of employees who are highly skilled in their respective areas, the output of the group will be of high quality.
Increasing the number of experienced employees in the team will reduce the need for supervision.
Each employee in the team is motivated to work equally hard to ensure that the group’s performance is satisfactory.
Each employee will work well within the boundaries of their divisional functions and conflicts will be relatively fewer.
Each employee will be committed to working within the resources allocated.

 

Question 15

1.  The advantages of oral communication are speed and feedback.

Answer

True

False

Question 16

1.  Treesa Mayering recently began her first job at a PR firm called Pro as a copywriter. Her job involves creating scripts for press releases, advertisements, and other media events. She has been working under the guidance of Will Preston, the senior copywriter. Treesa, who has no prior experience in this job, had worked on scripts for advertisements and online brochures alone, when she was asked to work on a press release for the first time. Will reviewed Treesa’s script and sent her an e-mail full of detailed corrections which she promptly implemented. However, when Will looked at the script later, he felt that it did not represent a significant improvement of her first draft. Which of the following, if true, would best explain this outcome?

Answer

Will routinely e-mailed feedback on scripts for advertisements, online brochures, and press releases to his team members.
Treesa was hired because she demonstrated considerable analytical and creative thinking skills in her pre-employment tests.
Will believed that Treesa’s understanding of his e-mailed feedback would be accurate.
Treesa took a lot of time to implement Will’s corrections and revise her script.
The feedback provided by Will was not elaborate and comprehensive enough.

 

Question 17

1.  Joe Sullivan and Mark Holland, members of the top management at EuAir, an European airlines, were preparing for a meeting to discuss strategies to combat the recent rise in fuel prices. Before the meeting began, Joe and Mark were discussing how oil prices significantly impact the health of the world economy. Joe spoke of how higher oil prices since 1999, partly the result of OPEC supply management policies, contributed to the global economic downturn in 2000-2001. Mark agreed but added that the right kind of strategy can help them overcome and even profitably use this opportunity for hiking fares. Which of the following statements, if true, would weaken the argument that Joe experienced groupshift during the meeting?

Answer

Joe stated that precise methods of fuel filling and consumption must be implemented to efficiently use their current supply of fuel.
Joe proposed the usage of direct and higher altitude routes that would curtail fuel consumption.
Joe stated that the company should cut expenditures on other areas like marketing and advertising instead of hiking fares to retain their current profit margins.
Joe stated that hiking prices would lead to losing market share to the low-cost airlines which already controlled half the market.
Joe suggested adding a fuel surcharge to all tickets for commercial flights with immediate effect.

Question 18

1.  Shirley Shands is a hardworker but Debra, her manager, is irritated with her. While Debra concedes that Shirley’s work gives her no cause for complaint, Debra is tired of the interruptions in her work because of Shirley asking for repeated clarifications over what exactly she has to say in e-mails or phone calls. She often requests Debra to proofread her e-mails before sending them, and Debra feels she sends too many e-mails instead of just speaking to the person concerned. From the scenario, we can conclude that ________.

Answer

Shirley processes her e-mails in an automatic and superficial manner
Shirley uses filtering when communicating with Debra
Debra is engaging in social loafing
Shirley and Debra come from a high-context culture
Shirley suffers from communication apprehension

Question 19

1.  Shane Dermott is a manager at a software design firm that develops software programs for clients using multiple teams of specialists. One of his most successful teams has been performing very well for years and so it came as a surprise to Shane when he noticed a sharp drop in the team’s performance. He decided to speak with the team individually and find a solution. After interviewing all 7 team members, he determined that one of the team members performed routine administrative tasks that were hardly visible to any of the other team members and understood that this was a case of social loafing which demotivated the entire group. Which of the following would most likely improve the performance of the employee who was social loafing?

giving him additional assignments to complete
providing him with administrative training
making him individually responsible for definite and crucial tasks
encouraging him to work more independently
empowering him to make decisions autonomously

Question 20

1.  Intellectual stimulation and individualized consideration are likely to be seen in the management by exception (active) style of leadership.

True

False

Question 21

1.  Which of the following statements is true regarding the effect of status on conformity pressure?

High-status individuals are often given less freedom to deviate from norms than are other group members.
People in high-status jobs have especially negative reactions to social pressure exerted by people in low-status jobs.
Lower-status people are better able to resist conformity pressures than their high-status peers.
Groups exert equal conformity pressure on all individuals regardless of their status.
As compared to high-status members, low-status members are given a wider range of discretion as long as their activities aren’t severely detrimental to group goal achievement.

Question 22

1.  Hank Murphy was selected to develop an advanced personal communication device with his own self-managed work team. Hank was assured that resource allocation and timelines were flexible for this project provided the work was a cut above that provided by the rest of the employees. As a part of the project guidelines, Hank included the demand that the device being developed by the team should also be marketed exclusively by them without resorting to franchising or cobranding. This was to ensure that customers recognized the product as reflecting the values of their company. Work on this project began with a lot of vigor and once the device was developed, Hank’s team implemented their marketing strategy. However, even three months after the product’s release, visibility remained low in the market and many reviewers did not consider the device to be much of an innovation. Which of the following statements, if true, would indicate a lack of reflexivity in Hank’s self-managed work team?

In Hank’s team, the members took accountability for the group’s performance as a whole and reported their individual progress to him as well.
The device was later marketed as a part of a national level tie-up with E-store outlets and did remarkably well in its second stint in the market.
Hank’s team members developed multiple blueprints of the device which were thoroughly discussed, improvised, and synthesized into the final plan for the product.
In the first few weeks of the project, Hank had witnessed a moderate level of conflict between the team members as each one had his own idea about how best to go about this high-priority project.
Hank’s team used e-mail and instant messaging to communicate unique information when some of the team members were not available for face-to-face interactions.

Question 23

1.  Groupthink is a phenomenon that relates to the consensus norms.

True

False

Question 24

1.  Transformational leadership has a greater impact on the bottom line in smaller, privately held firms than in more complex organizations.

True

False

Question 25

1.  Social loafing illustrates a process gain from using teams.

True

False

Question 26

1.  E-Way is an electronics company that is developing a new cellphone that will be released in the market soon. Which of the following, if true, would strengthen the argument that the company should use social media to promote the new cellphone?

Answer

E-Way’s last two releases received a lot of criticism from consumers.
The target consumers for the cellphone are not restricted to any demographic category.
One of E-Way’s rival companies had used social media successfully to advertise its new product.
The production team overshot the budget and the marketing team has low funds.
The company has a tightly integrated production and distribution mechanism.

Question 27

1.  Which of the following is true with regard to deviant workplace behavior?

Answer

It is involuntary in nature.

 
Widespread deviant workplace behavior depends on the accepted norms of the group.
It has a negligible adverse impact on organization as it is accepted by some employees.
Research on deviance at the workplace has shown that employees operating individually engage in more deviant behaviors than those who function as a part of groups.
Leaving work early is an example of a property-related deviant workplace behavior.

Question 28

1.  Hubert Gray needs an instruction manual developed for his new product. This is the last step of the project and he has severe budget constraints. He needs a small team of technical writers to work together closely to write the manual on fairly short notice. He needs them to communicate ideas quickly, creatively, and affordably. Which of the following group techniques should Hubert consider?

Answer

nominal and electronic
brainstorming
brainstorming and electronic
electronic and interacting
interacting and brainstorming

Question 29

1.  The behavioral theories view leadership as a set of actions that people can be trained in.

Answer

True

False

Question 30

1.  According to the Big Five personality model, emotional stability is the most important trait of effective leaders.

Answer

True

False

Question 31

1.  The time attendance system in the production division at MM, an automobile manufacturing company, was malfunctioning. Consequently, Greg Hill, one of the front-level managers sent it for repair. In the meantime, he placed a register where all workers of the production division had to provide their time of entry and exit from office. At the end of the week, when looking through the time logs, he had certain concerns about a group of employees. In the next week, he personally tracked the time this group of employees spent working and realized that they were reporting a greater number of working hours than they actually worked. This group engaged in a barrier to communication called ________.

Answer

lying
selective perception
silence
filtering
communication apprehension

Question 32

1.  Lionel Tucker has been asked to lead a virtual team on a project with a tight time schedule. While allocating the project to him, his manager impressed upon him the need to complete this project successfully and in time so that this client gains enough confidence to use their services in the future. Lionel and his team communicate via e-mail as the team members are located at geographically dispersed locations. They have not had even one face-to-face meeting as yet. In this case, Lionel must have an ability to ________ in addition to all the other desirable abilities of a leader to lead the team successfully.

Answer

avoid making any decisions for the team
generate money to inspire the team
convey support and trust through electronic means
generate charisma to inspire the team
micromanage his team members till project completion

Question 33

1.  Which of the following is an effective means of countering social loafing?

Answer

increasing the rewards the group is given if it succeeds
increasing the amount by which the group’s progress is monitored
ensuring that individual contributions to the group’s outcome are identified
increasing the size of the group
increasing the group’s workload

Question 34

1.  Unconventional behavior is one of the key characteristics of a charismatic leader.

Answer

True

False

Question 35

1.  Nancy is a part of a group at work which stresses a lot on collective goals and performance. Nancy is amazed at how well the members of the team use their skills to benefit themselves and their team members. Whenever a problem arises, the team, as a whole, provides reasons and solutions for the same. She enjoys working in this group as there is a lot of positive energy. This group that Nancy is a part of is a work group.

Answer

True

False

Question 36

1.  Jason Jones has been asked to assemble an eight-member self-managed work team of experienced employees to work on a project that combines the functional areas of research, production, marketing, and distribution. Jason is apprehensive about managing a team so large; he knows from prior experience that larger teams do not always result in greater productivity. Jason has also been informed by the management that this team is being established as the project must progress according to the predetermined timeline. The work lagging behind by one division will cause a cumulative delay in all the successive stages of the project’s execution. Which of the following measures, if adopted by Jason, would best ensure that the team members are working efficiently?

Answer

discouraging team members from restricting themselves to their own functional areas by experimenting with and learning the job done by other members of the team
implementing a group-based incentive he has planned for this team
instructing the team members to finalize the plan for the project right at the beginning and ensuring that it is implemented without any changes
assigning the specific tasks of the project to each team member by keeping in mind their preference and abilities
implementing a training program to provide the team members with the necessary technical and human relations skills for the project

Question 37

1.  In the communication process, decoding precedes encoding.

Answer

True

False

Question 38

1.  A software development firm has witnessed substantial growth and seeks to expand and reorganize its structure to meet the demands from clients in a better manner. HR has been given a clear directive that one of the major criteria for selection of recruits would be the candidate’s ability to function as a team player. This is because the company is revamping all its major functions from the traditional departmental model to an arrangement of flexible teams. Joe Sanchez is one of their oldest and most experienced employees who demonstrated considerable ability in developing the best programs but the problem with him is that he prefers to work alone. The company does not wish to lose resources like him and others who lack the ability to work in groups but team work is essential in their reorganization. Which of the following strategies will help rectify this problem? (MGMT 3720 – Organizational Behavior EXAM 3)

Answer

informing all employees that ability to work in teams will be major determinant for promotions and bonuses
encouraging employees like Joe to work more independently
increasing the size of teams so the contribution of people like Joe will not affect team performance overall
encouraging the formation of more diverse teams
applying merit-based compensation systems instead of gainsharing

Question 39

1.  In self-managed teams, supervisory positions may be eliminated.

True

False

Question 40

1.   Joe Sullivan and Mark Holland, members of the top management at EuAir, an European airlines, were preparing for a meeting to discuss strategies to combat the recent rise in fuel prices. Before the meeting began, Joe and Mark were discussing how oil prices significantly impact the health of the world economy. Joe spoke of how higher oil prices since 1999, partly the result of OPEC supply management policies, contributed to the global economic downturn in 2000-2001. Mark agreed but added that the right kind of strategy can help them overcome, and even profitably use, this opportunity for hiking fares. Which of the following statements, if true, would denote the occurrence of groupshift in Mark’s opinions during the meeting? (MGMT 3720 – Organizational Behavior EXAM 3)

Answer

Mark agreed with Joe’s opinion that providing the best service possible, even if it meant incurring a loss in the short run, would be the best strategy.
Mark proposed that this was an opportunity for EuAir to use its brand name effectively and diversify into other products and services.
Mark proposed that the prices be hiked and additional customer service measures be included so costumers have the best experience flying with EuAir.
Mark felt that EuAir should suspend some of its less profitable flights in the short run in favor of the routes that have greater demand among consumers.
Mark encouraged the top-management team to consider laying off surplus employees and rightsizing EuAir to enhance its efficiency and lower costs.

Question 41

1.  Which of the following statements regarding leadership is true?

Formal appointment is essential in creating leaders.
Nonsanctioned leadership is as important as formal influence.
Formal rights ensure good leadership.
All managers are leaders.
All leaders are hierarchically superior to followers.

 

Question 42

1.  Amy Jones has to come up with a strategy to regulate the excessive use of the Internet by her employees in such a way that they accept and commit to the solution themselves. It is advisable for her to use group decision making, rather than individual decision making in this situation.

Answer

True

False

Question 43

1.  Charismatic leadership is a manifestation of innate traits and it cannot be learned or enhanced. (MGMT 3720 – Organizational Behavior EXAM 3)

Answer

True

False

Question 44

1.  Jordan is a sales officer who has been underperforming over the last three months. At the last monthly operations cycle meeting, he was given a warning. As the time for the next meeting draws close, Jordan fears his boss reprimanding him. Two days before the meeting, Jordan informs his manager that he has confirmed six deals in the last few days, one of which involves multiple orders for their machines. He, however, skips the detail that these are the only six orders he has been able to obtain in the whole month. Which one of the barriers to effective communication is depicted here?

Answer

silence
language
filtering
information overload
grapevine

Question 45

1.  Research has shown that the larger the team, the more effective its performance.

Answer

True

False

Question 46

1.  Which of the following statements is true regarding team composition? (MGMT 3720 – Organizational Behavior EXAM 3)

Answer

Agreeableness is the only personality dimension that aids the ability to work in groups.
High-ability teams find it hard to adapt to changing situations.

 
A high-ability team will function well irrespective of the deficits in the abilities of the leader.
A team’s performance is merely the summation of its individual members’ abilities.
In successful teams, members should be selected to ensure all the various roles are filled.

Question 47

1.  The attribution theory of leadership says leadership is merely an attribution people make about other individuals.

Answer

True

False

Question 48

1.  Rhonda May was transferred to London three months back to oversee the opening of a new branch of the retail chain she worked for. Rhonda, who had never been to London, adjusted well with her British colleagues but received quizzical looks from many of her British colleagues every morning in the initial weeks in London. After asking one of her subordinates to explain what caused her colleagues to look at her in that strange way, she discovered the reason. When her British colleagues greeted her saying “how are you today?” every morning, she typically replied saying “I’m good” while Britishers typically say “I’m well” in response to this greeting. This is because “I’m good” can have multiple meanings like “I’m not a bad person” or “I’m suitable” while “I’m well” only gives a sense of mental and physical well-being. Rhonda then realized how subtly cultural barriers can operate. From the information provided in the scenario, this is an example of barriers caused by ________.

Answer

semantics and connotations
situational and physical cues
tone differences
intolerance toward other cultures
power distance

Question 49

1.  A slouched seated position reflects a casual and relaxed manner.

Answer

True

False

Question 50

1.  Lateral communications are often created to short-circuit the vertical hierarchy within an organization. (MGMT 3720 – Organizational Behavior EXAM 3)

Answer

True

False

 

References

https://www.researchgate.net/publication/369010197_Understanding_marketing_strategy_and_value_creation_in_the_era_of_business_competition

 
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Part A: STANDING WAVES ON A STRING Using PhET simulation

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Part A: STANDING WAVES ON A STRING Using PhET simulation

(Part A: STANDING WAVES ON A STRING Using PhET simulation) 12/27/2019

OBJECTIVE

To study standing waves on a string and see the effects of changing the tension in the string,

EQUIPMENT

PhET Simulation Wave on a String: https://phet.colorado.edu/en/simulation/wave-on-a-string

You can also reach this simulation by going to PhET, and looking for Wave on a String.

 

Theory: Standing Waves in Strings

For any wave with wavelength λ and frequency f, the speed, v, is

v = λf (1)

The speed of a wave on a string is also related to the tension in the string, T, and the linear density (=mass/length), μ, by

v2 = T/μ = λ2f2 (2)

L is the length of the string and n is the number of segments, antinodes, or harmonics. Since a segment is 1/2 wavelength then

λ = 2L/n where n = 1, 2, 3, … (3)

Solving Equation 2 for the tension yields:

T = μλ2f2 (4)

Which can also be written as:

(5)

PROCEDURE

Constant Tension

1. Open the software. Select: Oscillate, Amplitude = 0.10 cm, Damping = 0, Tension = Lowest, Fixed End.

2. Turn on the oscillator by pressing the large blue button with the arrow. You will see the wave going from left to right, hit the fixed end and reflect. The reflected waves will interfere with the waves going to the right.

3. Now adjust the frequency in the Signal Generator until you get a standing wave in one segment (i.e. the first harmonic). Note this frequency, and measure the wavelength by using the ruler tool. (Part A: STANDING WAVES ON A STRING Using PhET simulation)

4. Increase the frequency gradually until you obtain a standing wave in the 2nd, 3rd, 4th, and 5th harmonic. Record each frequency and wavelength.

5. Calculate the wavelength by using equation (3).

6. Calculate the velocity of the waves by using equation (1)

7. Change the oscillator to Pulse. Keep the pulse width small. Measure the time taken by the pulse to travel from the left to the right ends, and hence calculate the velocity of the pulse in the string. Repeat three times and take the average. Use this value as a second value of the speed of the wave.

8. Calculate the percent difference between the two speeds.

Number of Harmonic

 

 

 

( n )

 Number of nodes Wavelength

λ = 2L/n

 

 

 

( m )

 Frequency

f

 

 

 

( Hz )

 Speed of wave

V = λ*f

 

 

( m/s )
1
2
3
4
5

9. Repeat for the other two available tensions of the string. Case A: Lowest Tension

DATA TABLE

Length of the string: _________

Speed of the wave

Trial number Time for pulse to reach other end Speed of the wave
Average speed of the wave

Length of the string: ____________

Case B: Medium Tension

Number of Harmonic

 

 

 

( n )

 Number of nodes Wavelength

λ = 2L/n

 

 

 

( m )

 Frequency

f

 

 

 

( Hz )

 Speed of wave

V = λ*f

 

 

( m/s )
1
2
3
4
5

 

Speed of the wave

Trial number Time for pulse to reach other end Speed of the wave
Average speed of the wave

 

Length of the string: ____________

Case C: Highest Tension

Number of Harmonic

 

 

 

( n )

 Number of nodes Wavelength

λ = 2L/n

 

 

 

( m )

 Frequency

f

 

 

 

( Hz )

 Speed of wave

V = λ*f

 

 

( m/s )
1
2
3
4
5

 

Speed of the wave

Trial number Time for pulse to reach other end Speed of the wave
Average speed of the wave

Part B E-39-0 Electric Charges and Electric Fields ONLINE

6-21-2020 Adapted from manual from Dr. Kam Chu

 

Objective

To study the electric field and electric potential around different charges.

 

Equipment

PhET Simulation:

https://phet.colorado.edu/sims/html/charges-and-fields/latest/charges-and-fields_en.html

 

Theory

There is an electric field surrounding a charge, in which another charge would experience an electric force. The strength of the electric field at a distance from a point charge is given by:

(1)

Where is the Coulomb Constant, q is the charge, and r is the distance from the charge. The unit vector points away from a positive charge, and towards a negative charge. (Part A: STANDING WAVES ON A STRING Using PhET simulation)

 

The electric potential due to a point charge is given by the equation:

(2)

Where is the electric potential (in volts), and is a scalar quantity.

 

In this Lab, we will use a PhET simulation to study the electric field and electric potential surrounding single and multiple point charges.

 

Procedure

Play with the simulation (Charges and Fields) and get oriented with all the different options. This should help you understand the lab better. Note that you have positive and negative point charges, an electric field sensor (yellow circle), a tape measure and a voltmeter, that also makes the equipotential lines. For each case, take a screenshot and attach with your report. You may alsoturn on ‘gridlines’ if desired. Each small square of the grid is 10 cm wide and high. (Part A: STANDING WAVES ON A STRING Using PhET simulation)

 

Activity 1: Electric Field Lines and Equipotential Lines

1: Have one positive and one negative charge placed symmetrically in the field. Get the Electric field lines. Use the voltmeter to draw about ten equipotential lines (Figure 1 shows a related situation with a few equipotential lines)

2: Repeat with both charges being negative.

3: Repeat with both charges being positive.

4. Repeat with 4 positive charges (on top of each other, to create 4q) and one negative charge.

5. Parallel Plates: Put a large number of positive charges in a straight row (to look like a solid line). Make a negative line in the same way (parallel to the first). As an example, see figure 2. Get the electric field lines and Equipotential Lines between and surrounding the parallel plates.

6. Attach screenshot of the simulations in your report. Figure – 1

Figure-1: Parallel “plates”. 

 

 

 

 

 

 

ACTIVITY 2

1) Turn on ‘gridlines’.

2) Select positive point charge of any magnitude (you do this by placing the point charges on top of each other). Place the charge at the intersection of two thick gridlines, somewhere in the left half of the screen.

3) Use the tape measure and Voltmeter to find the voltage at different locations along the horizontal line on which the charge is placed. Enter values in Table 1.

4) Plot a graph in Excel between the voltage (y-axis) and the distance (x-axis).

5) Use Excel to determine the value of the Coulomb Constant (see eqn. (2). Find the percent error between the calculated and accepted values.

6) Use the tape measure and the yellow Electric Field sensor to measure the electric field at different distances in the horizontal direction from the charge. Enter the data in Table 2.

7) Plot a graph in Excel between the Electric Field (on y-axis) and distance (on x-axis)

8) Use Excel to determine the value of the Coulomb Constant (see eqn. (1)). Find the percent error between the calculated and accepted values.

9) Attach the screenshots, graphs and calculations to your report. (Part A: STANDING WAVES ON A STRING Using PhET simulation)

DATA

 

Table 1

Charge = _________

 

1 2 3 4 5 6 7
distance
voltage

 

 

Value of k found from the graph: ___________

Percent error in k: ________________

 

Table 2

Charge = __________

1 2 3 4 5 6 7
distance
Electric Field

 

 

Value of k found from the graph: ___________

 

Percent error in k: ________________

 

Part C E-35-O CAPACITORS IN CIRCUITS ONLINE LAB

7/1/2020

OBJECTIVES

The purpose of this lab will be to determine how capacitors behave in R-C circuits by measuring the time for charging and discharging. The manner in which capacitors combine will also be studied.

 

EQUIPMENT

PhET interactive simulation tool [Circuit Construction Kit: (AC+DC) – Virtual Lab]

https://phet.colorado.edu/en/simulation/legacy/circuit-construction-kit-ac-virtual-lab

 

PROCEDURE

1. Open the simulation by ctrl+click the link, or copy paste the link to the browser. The simulation should look like that shown in Fig.6

2. Since this simulation is in java (and not web based as some of the others), you may have to download the simulation. If you cannot run the simulation, you may need to follow the following PhET help guidelines: https://phet.colorado.edu/en/help-center/running-sims

Then click “Why can Irun some of the simulations but not all?”

3. Run the simulation, and you will see a page like that shown in Fig.7.

4. You would not set up the circuit. For assistance in setting up the circuit, see the manual: 00PhET Simulation Tool Instructions for Electric Circuits Labs.

5. This experiment requires you to measure the voltage as a function of time. The timer can be easily controlled by using the Pause/Play button (►) and/or the step button (|►) (these are at the bottom of the page).

 

 

 

 

 

 

 

 

Figure 6. Figure 7.

Case-A: charging the capacitor.

1. Set up the circuit as shown in figure 8. Once set up, it should look something like that shown in figure 9.

2. Set the resistance to 100 Ω, capacitance to 0.05 F, and Battery to 10.0 V.

3. Before charging the capacitor, make sure that it has no charge (the voltmeter reads zero). Otherwise you need to discharge the capacitor first until the voltage across the capacitor becomes zero. (Part A: STANDING WAVES ON A STRING Using PhET simulation)

4. Put switch S1 in the ON state and switch S2 to the OFF state.

5. Set the Pause/Play button (►) to pause and the timer to zero. Before 5 seconds, use the step button (|►) to increase time by 0.5 second intervals and record the voltage values in Table I. After 5 seconds, use the Pause/Play button (►/||) to record the voltage at around 7.00, 10.0, 15.0, 20.0, and 25.0 seconds.

6. Using equation (5), obtain the charge at each time, and enter in Table 1.

7. Draw a graph between charge on y-axis and time on x-axis. It should look like Fig. 3.

8. Use the known values of resistance and capacitance to calculate the time constant and the maximum charge by using eqn. (2) and eqn. (3), and enter in Table 2.

9. Calculate the charges equal to one time constant, two time constants, and five time constants and enter in Table 2. Compare these with the experimental values using % error. Put your calculation in the table II.

C

 

 

Figure 8

 

 

 

Volt-meter

 

 

 

 

 

 

 

 

 

 

Figure 9.

 

Case-B: Discharging capacitor

1. Set up the circuit as shown in figure 8.

2. Set the resistance to 100 Ω, capacitance to 0.05 F, and Battery to 10.0 V.

3. Before discharging the capacitor, make sure the capacitor has been fully charged (the voltmeter reading is very close to 10.0 V).

4. Set switch to off and switch to on.

5. Set the Pause/Play button (►) to pause, and the stopwatch to zero. For time less than 5 seconds, use the step button (|►) to increase time by 0.5 second intervals. Record the voltage values in Table 3. After 5 seconds, use the Pause/Play button (►/||) to record the voltage at about 10.0, 15.0, 20.0, and 25.0 seconds.

6. Using equation (5), obtain the charge at each time, and enter in Table 3.

7. Draw a graph between charge on y-axis and time on x-axis. It should look like Fig. 5.

8. Use the known values of resistance and capacitance to calculate the time constant and the maximum charge by using eqn. (2) and eqn. (3), and enter in Table 4.

9. Calculate the charges equal to one time constant, two time constants, and five time constants and enter in Table 4. Compare these with the experimental values using % error. Put your calculation in the table II.

Case-C: Capacitors in Series.

1. Set up the circuit as shown in figure 10.

2. Set the resistance to 100 Ω, each capacitance to 0.05 F, and Battery to 10.0 V.

3. Before charging the capacitor, make sure that it has no charge (the voltmeter reads zero). Otherwise you need to discharge the capacitor first until the voltage across the capacitor becomes zero.

4. Put switch S1 in the ON state and switch S2 to the OFF state.

5. Now calculate the value of the time constant by using the equation for sum of capacitors in series.

6. Start charging the capacitors and note the voltage difference across both capacitors. Note the time it takes for the voltage to reach 63.2 % of Vmax. This is the measured value of time constant. Note this in Table 5.

7. Now charge the capacitors to full charge, and by using proper switching, measure the time for the voltage across them to fall BY 63.2% of Vmax. This is the measured time constant for discharging the capacitors.

8. Compare the measured and calculated values of the time constant for capacitors in series. (Part A: STANDING WAVES ON A STRING Using PhET simulation)

 

 

 

 

Figure 11

 

 

Volt-meter

 

 

 

 

C1

C2

Volt-meter

 

 

C2

C1

 

 

 

 

 

 

 

Figure 10

 

 

Case-D: Capacitors in parallel.

1. Set up the circuit as shown in figure 11.

2. Set the resistance to 100 Ω, each capacitance to 0.05 F, and Battery to 10.0 V.

3. Repeat the steps needed to measure the time constant while charging and while discharging, and compare with the calculated value for capacitors in parallel.

4. Enter the results in Table 5.

 

DATA

Case-A: Data for charging a single capacitor

 

Table-1

Resistance R = _________ Capacitance C = ________

 

Time

(s)

 Measured Voltage (VC) Charge on Capacitor

q(t)

(eqn. (5)

 Time (s) Measured Voltage (VC) Charge on Capacitor q(t)

(eqn. (5)

 Time (s) Measured Voltage (VC) Charge on Capacitor q(t)

(eqn. (5)
0.50 3.00 7.00
1.00 3.50 10.0
1.50 4.00 15.0
2.00 4.50 20.0
2.50 5.00 25.0

 

 

Make a graph between q(t) and time.

 

Table 2

 

Maximum Charge from eqn (2) = Q = ___________

RC time constant from eqn (3) = τ = ___________

 

Calculated value

eqn (1)

 Experimental value

eqn (5)

 % error
Charge at t = 1 τ
Charge at t = 2 τ
Charge at t = 3 τ

 

 

 

Case-B: Data for Discharging a single capacitor

 

Table-3

Resistance R = _________ Capacitance C = ________

 

Time

(s)

 Measured Voltage (VC) Charge on Capacitor

q(t)

(eqn. (5)

 Time (s) Measured Voltage (VC) Charge on Capacitor q(t)

(eqn. (5)

 Time (s) Measured Voltage (VC) Charge on Capacitor q(t)

(eqn. (5)
0.50 3.00 7.00
1.00 3.50 10.0
1.50 4.00 15.0
2.00 4.50 20.0
2.50 5.00 25.0

 

 

Make a graph between q(t) and time.

 

 

Table 4

 

Maximum Charge from eqn (2) = Q = ___________

RC time constant from eqn (3) = τ = ___________

 

Calculated value

eqn (4)

 Experimental value

eqn (5)

 % error
Charge at t = 1 τ
Charge at t = 2 τ
Charge at t = 3 τ

 

 

 

Case C and D: Data for Two Capacitors in Series and Parallel:

 

Table 5:

Resistance: ____________ Capacitance 1: _____________ Capacitance 2: _____________

 

Type of Circuit

Capacitors in:

 Calculated values of

τC and τD

 Measured Charging time τC Measured Discharging time τD Percent error in time of charging Percent error in time of discharging
Series
Parallel

 

 

τC : Time constant for charging

τD : Time constant for discharging

 

Part D Lab 2 Ohm’s Law

 

Objective

Learn to build a simple circuit with one resistor and one DC source.

Use PhET interactive simulation tool (Circuit Construction Kit AC Prototype) to build circuits and verify Ohm’s Law.

Theory

Ohm’s Law states that the electric current passing through a resistor with resistance is proportional to the voltage (electric potential difference) across the resistor and inversely proportional to the resistance

 

Equipment

Ⓐ

 

 

 

Figure-1

PhET interactive simulation tool (Circuit Construction Kit: DC – Virtual Lab)

https://phet.colorado.edu/en/simulation/circuit-construction-kit-dc-virtual-lab

For guidance on how to use the simulation, tool, see PhET Simulation Tool Instructions for Electric Circuits Labs.

 

Procedures

1. Build the circuit as shown in Figure 1 using the PhET Simulation Tool.

2. Set the DC Power Source to 12.0 V.

3. Create three resistors 10.0 Ω, 20.0 Ω, and 30.0 Ω. Putting each resistor into the circuit one at a time, measure voltage using the voltmeter and record the values on Table 1. Note that the volt-meter should be parallel with the resistor.

4. With the power source still set at 12.0 V, measure the current of each resistor and record the values on Table 1. The ammeter should be in series with the resistor. You must first cut the circuit and open it with two disconnected ends and then plug in the ammeter. Please refer to “PhET Simulation Tool Instructions for Electric Circuits Labs” for how to measure current.

5. Avoid the common mistake of connecting the ammeter directly to the power supply’s two terminals.

6. Compare the calculated and measured currents in Table 1 and find the percentage difference.

7. Put the 10.0 Ω resistor in the circuit and increase the voltage of the power supply from to using increments. Using the method outlined in step 4, measure the current at each step. Record the voltage and current values in Table 2.

8. Plot the voltage-current curve and find the slope of the line. The slope of the line will be the resistance.

9. Compare the measured with the known values of the resistance values and find the percentage error.

 

In you report, include screenshots of the circuits that you make for doing this Lab. (Part A: STANDING WAVES ON A STRING Using PhET simulation)

Data Table 1

DC Power Source: 12.0 V

 

Resistance Measured Voltage Calculated Current (Equation 1) Measured Current % difference in the current
10.0 Ω
20.0 Ω
30.0 Ω

 

 

Data Table 2

Resistance: 10.0 Ω

 

Voltage

(volt)

 Measured Current

(ampere)

 Slope (equals resistance)

(ohm)

 % error in resistance
1.00 V
2.00 V
3.00 V
4.00 V
5.00 V

 

 

Part E Series and Parallel Circuit

(Using PhET Simulation Tool)

Objective

1. Learn to build up series circuit and a parallel circuit with three resisters.

2. Use PhET interactive simulation tool (Circuit Construction Kit AC Prototype) to build the circuits and Verify Ohm’s Law

Theory

The relations for two resisters in series and parallel circuits are the following:

Series Circuit Parallel Circuit

 

 

 

 
 

 

 

  

 

 
 

 

 

 

 

 

 

 

 

 

 

 

Figure 1 Two resister in series

  

 

 

 

 

 

 

 

 

Figure 2 Two resister in parallel

 

Equipment

PhET interactive simulation tool (Circuit Construction Kit: DC – Virtual Lab)

https://phet.colorado.edu/en/simulation/circuit-construction-kit-dc-virtual-lab

 

Procedures

 

Build the circuit as shown in Figure 1 by using PhET Simulation Tool

 

1. Click the above http link, you will see

 

2. Click ▲, you will see

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

3. Now you build your circuit by using “wire”, “Battery” and “Resistor”

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

4. You can tap the circuit elements to change it value by adjust

 

 

 

 

 

 

 

 

 

 

 

 

 

 

5. You can also toggle between the battery and the battery symbol as shown above.

6. Use the circuit board, build the series circuit by using three resisters as shown in the following figure 3: set up , , ,

 

 

 

 

 

Figure 3

 

 

 

7. Measure the voltage across each resister, the voltage across over the two and (resister) and the voltage across over all the resisters (). Record the values on the table 1.

 

How to use the circuit board tool Voltmeter to measure the voltage

 

Simple drag the Voltmeter to the necessary location as shown in the following figure.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

8. Using Ohm’s law calculate the currents for each resister and put the values on table 1.

9. Using circuit board tool Ammeters measure the current passing through each resister and record the values on the table 1. Note that the Ammeters should be in series with the resister. (The figure below show you how to cut a circuit open and then put the Ammeters)

 

 

 

 

 

 

 

 

 

 

 

 

10. Compare the current in table 1, and find the percentage difference.

11. Use the circuit board, build the parallel circuit by using three resisters as shown in the following figure 4.

 

 

 

 

 

 

 

 

 

 

Figure 4

 

 

 

 

12. Repeat procedures from 7 to 10, record the data in table 1, and find the percentage difference.

 

Data Table 1

Resistance: :___________ :____________ :____________

 

Series Parallel
Measured Voltage  

(Ohm law)

 Measured Current % difference Measured Voltage  

(Ohm law)

 Measured Current % difference

 

 

Your Lab Report Should Include the Following

 

1. Lab theory

2. Your build circuit photo

3. Procedures

4. Your circuit setup photo which shows voltage [across the two and (resister)] measurement; and circuit setup photo which shows current [pass through the two resistor and (resister)] measurement.

5. Data Table 1

6. Conclusion

Part F Combination of Series and Parallel Circuit

(Using PhET Simulation Tool)

Objective

3. Learn to build up a combination of series and parallel circuit with three resisters.

4. Use PhET interactive simulation tool (Circuit Construction Kit AC Prototype) to build the circuits and Verify Ohm’s Law

 

Theory

Combination of Series and Parallel Circuit
 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Figure 1 Two resister in series

  

 

 
 

 

 

 

 

Equipment

PhET interactive simulation tool (Circuit Construction Kit: DC – Virtual Lab)

https://phet.colorado.edu/en/simulation/circuit-construction-kit-dc-virtual-lab

 

Procedures

 

Build the circuit as shown in Figure 1 by using PhET Simulation Tool

 

13. Click the above http link, you will see

 

14. Click ▲, you will see

 

 

 

 

 

 

 

 

 

 

 

 

 

 

15. Now you can build your circuit by using “wire”, “Battery” and “Resistor”

 

 

 

 

 

 

 

 

 

 

 

 

 

 

16. You can tap the circuit elements to change it value by adjust

 

 

 

 

 

 

 

 

 

 

 

 

17. You can also toggle between the battery and the battery symbol as shown above.

18. Use the circuit board, build a combination of series and parallel circuit by using three resisters as shown in the following figure 2: set up , , ,

 

 

 

 

 

 

Figure 2

 

 

 

19. Measure the voltage across each resister, and the voltage across over the two and (resister) Record the values on the table 1.

 

How to use the circuit board tool Voltmeter to measure the voltage

 

Simple drag the Voltmeter to the necessary location as shown in the following figure.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

20. Using Ohm’s law calculate the currents for each resister and put the values on table 1.

21. Using circuit board tool Ammeters measure the current passing through each resister, and the current going through the two and (resister). Record the values on the table 1. Note that the Ammeters should be in series with the resister. (The figure below show you how to cut a circuit open and then put the Ammeters)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

22. Compare measured current in column 3 and calculated current in column 4 in the table 1, and find the percentage error.

 

Data Table 1

 

Resistance: :___________ :____________ :____________

 

 

1 2 3 4 5
Measured Voltage Calculated Current

(Using Ohm’s Law)

 Measured Current Calculated Current

(Using Equation 1-6)

 % error (compare column 3 and 4)

 

 

Your Lab Report Should Include the Following

 

7. Lab theory

8. Your build circuit photo

9. Procedures

10. Your circuit setup photo which shows voltage [across the two and (resister)] measurement; and circuit setup photo which shows current [pass through the two resistor and (resister) measurement.

11. Data Table 1

12. Calculation details in column 4

13. Conclusion

 

Part G E-34-O KIRCHHOFF’S RULES ONLINE LAB

7/01/2020

 

OBJECTIVE

The purpose of this lab will be to experimentally demonstrate Kirchhoff’s Rules for electrical circuits.

 

EQUIPMENT

PhET interactive simulation tool (Circuit Construction Kit: DC – Virtual Lab):

https://phet.colorado.edu/en/simulation/circuit-construction-kit-dc-virtual-lab

For an introduction on using the PhET Circuit Construction simulation, see: 00-PhET Simulation Tool instructions for Electric Circuits Labs.

 

THEORY (Part A: STANDING WAVES ON A STRING Using PhET simulation)

Electronic circuits that cannot be reduced to simple series of parallel circuits can be analyzed by different methods. As an example, consider the circuit of figure 1. The currents and voltage drops across the resistances cannot be found by a simple application of Ohm’s Law. In this circuit, points A and D are called Junctions, since more than two wires connect there. A closed loop is any path that starts at some point in the circuit, passes through the elements of the circuit, and arrives back at the same point, without passing through any element more than once. There are three such closed loops in the circuit of Figure 1. These are Loop 1: A-B-C-D-A, Loop 2: A-D-E-F-G-A, and Loop 3: B-C-D-E-F-G-A-B. The junctions and loops are used in two Kirchhoff’s rules to analyze the circuit.

KCR- Kirchhoff’s Current Rule: The sum of the currents entering a junction = sum of currents leaving a junction. Or equivalently: the net current entering a junction is zero.

KVR-Kirchhoff’s Voltage Rule: The algebraic sum of the voltage changes around any closed loop is zero.

We would usually know the values of the battery voltages and resistances. As a first step, we label and assign directions (arbitrarily) to the currents in each section of the circuit (i.e. between each junction). We then write the junction equation (assuming a current entering the junction is positive, and leaving the junction is negative) at node D as:

i1 + i3 – i2 = 0 (1)

We now traverse the closed loops in any direction (clockwise or counter-clockwise, the resulting equations are equivalent) and add up all the changes in the voltages and set them to zero, i.e.

ΣΔV = 0 (2)

The voltage change across a resistor is found by Ohm’s Law as

ΔV = I R (3)

The sign of ΔV is positive if we are crossing the resistance in a direction that is against the direction of the current in that resistor, and it is negative if we go across the resistor in the same direction as the current. The ΔV across the battery is positive if we cross it from its negative to its positive side. With these, the equations for the three loops become:

Loop 1 (starting at the point A and going clockwise):

V1 – i1*R1 – i1*R2 + i3*R3 = 0.0 (4)

 

Loop 2 (starting at A and going clockwise):

-i3*R3 – i2*R4 + V2 – i2*R5 = 0.0 (5)

Loop 3 (starting at A, and going clockwise):

+V1 – i1*R1 – i1*R2 – i2*R4 + V2 – i2*R5 = 0.0 (6)

Note that equation (6) is simply the sum of equations (4) and (5), and is therefore not an independent equation. The same would apply to the junction rule applied at node A. So the useful (or independent) number of Junction equations that we can use are one less than the number of junctions, and the Loop equations are one less than the number of loops.

We then simultaneously solve equation (1) and any two out of equations (4), (5) and (6) to obtain the values of the currents i1, i2 and i3. In case any of the currents comes out to be negative, it simply means that we had choses then wrong direction for that current.

 

 

 

 

 

 

 

 

 

 

PROCEDURE (Part A: STANDING WAVES ON A STRING Using PhET simulation)

1 Select five resistors and measure and note their resistances. Label them as R1, R2, … , R5. Select resistors that are in the range of 10.0 Ω to 100.0 Ω.

2 Connect the resistors on the PhET simulation to make the circuit as shown in Figure 1. Attach the two batteries to appropriate points on the circuit. Set their voltages between 6.0 to 10.0 volts each. (The two voltages may or may not be the same). Note the positions of the resistors R1, R2, … R5. Measure the voltages across the batteries and note these as V1 and V2 in the Data Sheet.

3 Using the values of the resistances and battery voltages, calculate the currents i1, i2 and i3 by using the two Kirchhoff’s Rules. Use the same notation and directions of the currents as used in Figure 1. Use the calculated currents to calculate the potential difference across each resistor by using Ohm’s Law.

4 Once the calculations are done, you have an idea of what values to expect. First measure the voltages across each of the resistors and note it.

5 Now measure the currents i1, i2 and i3. For this you would need to break the circuit and insert the ammeter in series with the wires to complete the loop.

6 Calculate the percent errors in the calculated and measured values of the currents and voltages. Check to see if the Kirchhoff’s Junction rule and Loop Rules are verified.

 

DATASHEET: KIRCHHOFF’S RULES

 

 

V1 =
V2 =

 

 

 

RESISTANCE CURRENT VOLTAGE
CALCULATED MEASURED % ERROR CALCULATED MEASURED % ERROR
R1 =
R2 =
R3 =
R4 =
R5 =

 

 

 

Part H: Geometrical Optics Using PhET SIMULATIONS (Part A: STANDING WAVES ON A STRING Using PhET simulation)

Rev 3-14-2020

 

OBJECTIVE

To study the reflection of light on flat and curved surfaces, and refraction of light though different shapes, and to find the focal length of a convex lens.

 

EQUIPMENT

PhET simulation Bending Light: https://phet.colorado.edu/en/simulation/bending-light

 

PhET simulation Geometric Optics: https://phet.colorado.edu/en/simulation/legacy/geometric-optics

 

You can also get to the simulations by entering in your browser: Phet, then select Physics. Then select Bending Light, and Geometric Optics simulations.

 

PROCEDURE (Part A: STANDING WAVES ON A STRING Using PhET simulation)

The procedure for all experiments will be to track a laser beam as it reflects or refracts. In the simulations that we will use, we have a laser that can be turned on or off by clicking the red button on it. It can also be moved and rotated. The laser will give a narrow ray of light which we will follow as it reflects or refracts. This can be done for several points in the beam’s path.

 

In most cases, you would need to measure the angle, which is done from the normal to the surface. You can turn on the normal by selecting it in one of the menu boxes on the page. You can measure the angle by using the protractor tool. Complete the Results section at the end.

 

CASE A: Reflection from a Plane Mirror (see figure 1)

1. After opening the simulation, select “INTRO”.

2. Select the material where the laser is as “AIR”, and that on the lower side as “WATER”.

3. Set the laser to any arbitrary angle. Turn on the laser.

4. Use the Protractor to measure the angle of the incident ray and angle of the reflected ray (this is dimmer than the incident ray). (ignore the ray going into the water). Repeat for different angles.

5. Repeat for AIR and GLASS as the materials.

6. Enter the results in Table A, and verify that the angle of incidence = angle of reflection.

CASE B: Refraction (see figure 2)

1. After opening the simulation, select “INTRO”.

2. Select the material where the laser is as “AIR”, and that on the lower side as “WATER”.

3. Set the laser to any arbitrary angle. Turn on the laser.

4. Use the Protractor to measure the angle of the incident ray and angle of the refracted ray (i.e. the one entering the water). (ignore the reflected ray). Repeat for different angles.

5. Repeat for AIR and GLASS as the materials.

6. Repeat with AIR and MYSTERY A as the two materials.

7. Enter the results in Table B, and calculate the refractive indices of water, glass and Mystery A by using equation 1.

 

CASE C: Refraction Again (see figure 7)

1. After opening the simulation, select “PRISM”.

2. From the bottom panel, select the Square. Set Reflections Off. Turn on Normal.

3. Select the Environment as AIR. Select Objects as GLASS.

4. Set the laser to any arbitrary angle, pointing to the square. Turn on the laser.

5. Use the Protractor to measure the angle of the incident ray and angle of the refracted ray (i.e. the one entering and inside the square). Make sure that the ray inside the square does not reflect form the side surface.

6. Use these angles to calculate the refractive index of the material by using equation 1. Repeat with different angles.

7. Repeat for MYSTERY B as the material of the square.

8. Enter the results in Table C.

CASE D: Total Internal Reflection (Part A: STANDING WAVES ON A STRING Using PhET simulation)

1. After opening the simulation, select “INTRO”.

2. Select the material where the laser is as “WATER”, and that on the lower side as “AIR” (i.e. the laser beam is going from water into air)

3. Set the laser to a small angle (i.e. close to the normal). Turn on the laser.

4. Increase the angle slowly and observe the refracted ray. At some angle, the refracted ray will become parallel to the water-air surface. Beyond this point, when the angle is further increased, there is no refracted ray, only a reflected ray. This is Total Internal Reflection. The angle that the incident ray makes at the point at which the refracted ray becomes parallel to the glass surface (i.e. angle of refraction = 90), is called the Critical Angle. Use the Protractor to measure the angle of incidence at this point. Use equation 3 to compare the calculated and measured values of the Critical Angle.

5. Repeat to find the critical angle for the GLASS – AIR interface.

6. Enter the results in Table D.

 

CASE E: Total Internal Reflection Again (see figure 6)

1. After opening the simulation, select “PRISM”.

2. Select the semi-circular object, and bring it to the middle of the screen. Its straight side should be vertical.

3. Select the Environment as Air, and semi-circular object as Glass. Turn on Normal. Turn off Reflections.

4. Turn on the laser. Set the laser to an angle about 40° with the horizontal.

5. Now place the cursor in the object, with left click hold the object and move it (it should not rotate) to a position so that the laser beam entering it is at zero degrees to the surface. This is when the beam is directly over (i.e. parallel to) the normal. It will now be exiting the object from center of the flat side, which is also the center of the circle forming the curved side. Now rotate the Object by holding it from the little thing at its bottom. The object must not move, only rotate. This will rotate it about its center so that the beam is always exiting from the center of the flat side.

6. Keep rotating the object slowly, until the exiting beam is parallel to the flat surface. If you turn it a bit more, the beam will have Total Internal Reflection. Use the protractor to measure the angle on incidence inside the object at the flat surface at the point of Total Internal Reflection. The angle of refraction should be 90°. Use equation 3 to compare the calculated and measured values of the Critical Angle.

7. Repeat for Mystery A. Use the refractive Index found in Case B for calculating the percent error.

8. Enter the results in Table E.

 

CASE F: Refraction Light Ray Shift (see figure 7)

1. After opening the simulation, select “PRISM”.

2. From the bottom panel, select the Square. Set Reflections Off. Turn on Normal.

3. Select the Environment as Air. Select Objects as Glass.

4. Set the laser to any arbitrary angle, pointing to the square. Turn on the laser. The laser beam should come out from the back side.

5. Note (figure out how), the position of the refracted ray coming out of the glass on the other side.

6. Change the material of the Object to “Air”. This will cause the ray to go straight (since refractive indices of environment and square are the same). Note the position of this ray.

7. Measure the distance that the ray shifts when the Object is Air and when it is Glass (figure out how to do this). Enter the results in Table 6.

8. Measure the thickness of the square. Enter all data in Table F.

9. Use equation 6 to calculate the shift, and compare with your measured value.

h

d

 

(6)

 

CASE G: Deviation of light by a prism (see figure 3)

1. After opening the simulation, select “PRISM”.

2. From the bottom panel, select the Triangle (prism). Set Reflections Off. Turn on Normal.

3. Select the Environment as Air. Select Objects as Glass.

4. Set the laser to any arbitrary angle, pointing to the prism. Turn on the laser. The laser beam should come out from the other side.

5. Use the protractor to measure the angle of incidence θi , angle of refraction θr, angle of the prism A , and angle of Deviation δ, and record them in Table G.

6. Calculate the angle of deviation by using equation (4), and compare with measured value. Use the refractive index of glass found in Case C.

 

CASE H: Focal Length of a Convex Lens (see figure 4) (Part A: STANDING WAVES ON A STRING Using PhET simulation)

1. Open the simulation: Geometric Optics.

2. Select Principal Rays and Screen. Select some values of Curvature, Refractive Index and Diameter of the lens.

3. Place the lamp al some position on the principal Axis (the horizontal line passing through the center of the lens).

4. Move the screen until the image becomes a small dot. The image of the object is now in focus on the screen.

5. Select the Ruler, and measure the distance from the center of the lens to the light source. (Measure to the point where the rays join together). This is the Object distance ‘p’. Now measure the image distance ‘q’ from the lens to the screen (to the point where the rays join). You may have to select a pencil or an arrow as the object to do this.

6. Note the data in Table H, and calculate the focal length, ‘f’, of the lens.

7. Repeat for several different positions of the object. Have at least one position where you get a virtual image (i.e. when object is between lens and the focal length).

8. Measure the focal length (this is the distance from lens to the ‘X’ on the Principal Axis.

RESULTS

All values are measured values unless mentioned. Attach at least one image of each case with your report.

 

TABLE A: LAW OF REFLECTION

Trial number Angle of Incidence Angle of Reflection Percent Difference

 

TABLE B: LAW OF REFRACTION (Part A: STANDING WAVES ON A STRING Using PhET simulation)

Material Trial number Angle of Incidence Angle of Refraction Refractive Index (equation 1) Average of three values Percent Error in refractive index
Water
Water
Water
Glass
Glass
Glass
Mystery A
Mystery A
Mystery A

TABLE C: LAW OF REFRACTION AGAIN

Material Trial number Angle of Incidence Angle of Refraction Refractive Index (equation 1) Average of three values Percent Error in refractive index
Glass
Glass
Glass
Mystery B
Mystery B
Mystery B

TABLE D: TOTAL INTERNAL REFLECTION

 

Material Trial number Angle of Incidence Angle of Refraction Critical Angle

Calculated

 Percent Error in Critical Angle
Water-Air
Glass-Air

 

 

 

TABLE E: TOTAL INTERNAL REFLECTION AGAIN

 

Material Trial number Angle of Incidence Angle of Refraction Critical Angle

Calculated

 Percent Error in Critical Angle
Water-Air
Mystery-Air

 

 

TABLE F: REFRACTION LIGHT RAY SHIFT

Trial Number Angle of Incidence Angle of Refraction Thickness ‘h’ of the square Measured Value of Shift in the Ray Calculated Value of the Shift Percent error in shift

 

TABLE G: DEVIATION OF LIGTH FROM A PRISM

Trial Number Angle of Incidence Angle of Refraction Angle of Prism Angle of Deviation Calculated Angle of Deviation Percent error in angle of Deviation
No Distance from Lens to Object

p

 Distance from Lens to Image

q

 Calculated Focal Length by equation 1

f
Average value of Focal Length
Percent error

TABLE H: FOCAL LENGTH OF A CONVEX LENS (Part A: STANDING WAVES ON A STRING Using PhET simulation)

 
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Ethical Conduct

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Ethical Conduct

(Ethical Conduct) Discuss nursing ethics based on the case study.

Ethical Conduct

Nursing Ethics in the Context of a Case Study

Nursing ethics is crucial in ensuring that patient care aligns with moral principles. A recent case study highlights the importance of ethical considerations in nursing. In this case, a nurse faced a dilemma when a terminally ill patient requested assistance in ending their life. This situation presents various ethical challenges, requiring a thorough understanding of nursing ethics to navigate effectively.

Respect for Autonomy

Firstly, respect for autonomy is a fundamental ethical principle in nursing. Autonomy refers to the patient’s right to make decisions about their own health care. In the case study, the patient expressed a clear desire to end their suffering through euthanasia. Therefore, the nurse must respect this wish while considering legal and professional boundaries. To support the patient’s autonomy, the nurse should ensure the patient fully understands their options and the potential consequences of their decision. (Ethical Conduct)

Beneficence and Non-Maleficence

Beneficence and non-maleficence are also critical in nursing ethics. Beneficence involves promoting the patient’s well-being, while non-maleficence means avoiding harm. In the case study, the nurse faces a conflict between these principles. Assisting the patient in ending their life may be seen as promoting well-being by alleviating suffering. However, it also involves causing harm. The nurse must carefully weigh these principles to determine the best course of action.

Legal and Professional Considerations

Legal and professional considerations also play a significant role in nursing ethics. The nurse must adhere to the laws and regulations governing their practice. In many jurisdictions, euthanasia is illegal, and assisting a patient in ending their life could result in severe legal consequences. Moreover, professional codes of ethics, such as the American Nurses Association’s Code of Ethics, provide guidelines for nurses. These codes often emphasize the importance of preserving life and prohibit actions that intentionally cause death. Thus, the nurse must balance ethical principles with legal and professional obligations. (Ethical Conduct)

Communication and Compassion

Effective communication and compassion are essential in addressing ethical dilemmas. The nurse should engage in open, honest conversations with the patient and their family. This approach helps to understand their perspectives and provide emotional support. By listening to the patient’s concerns and explaining the ethical and legal constraints, the nurse can build trust and provide compassionate care. Additionally, involving other healthcare professionals, such as physicians and ethicists, can offer valuable insights and support in decision-making.

Ethical Decision-Making Frameworks

Applying ethical decision-making frameworks can guide nurses in resolving complex ethical dilemmas. One such framework is the Four-Box Method, which considers medical indications, patient preferences, quality of life, and contextual features. By systematically evaluating these factors, the nurse can make a well-informed decision. In the case study, this approach could help balance the patient’s desire for euthanasia with the ethical, legal, and professional considerations involved.

Conclusion

Nursing ethics require a careful balance of respecting patient autonomy, promoting well-being, avoiding harm, and adhering to legal and professional standards. In the presented case study, the nurse faces a challenging ethical dilemma when a terminally ill patient requests assistance in ending their life. By applying ethical principles, effective communication, and decision-making frameworks, the nurse can navigate this complex situation. This approach ensures that patient care remains compassionate, ethical, and legally compliant.

References

https://www.nursingworld.org/practice-policy/nursing-excellence/ethics/code-of-ethics-for-nurses/

 
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Forensic Analysis and Drug Classification

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Forensic Analysis and Drug Classification

(Forensic Analysis and Drug Classification)

Respond to one of the following:

Option 1: Differentiate between organic and inorganic analysis.  Differentiate between qualitative and quantitative measurement

Option 2: Gas chromatography is one of the basic analysis procedures for the crime lab.  Describe this process and the theory upon which it is based.

Option 3: Describe the Mass Spectrometry process.

Option 4: Describe the X-ray diffraction process.

Option 5: Our text describes five types of microscopes commonly used in forensic analysis.  List them and briefly describe the function of each.

Option 6: Below is a series of twenty-three questions about drugs or drug use. For your original posting, answer one of these questions that has not been answered by anyone else as yet by identifying which question you are answering by number.  There should be enough questions that each of you can answer a separate one.

Following are descriptions of behavior that are characteristic among users of certain classes of drugs. For each description, indicate the class of drug (narcotics, stimulants, and so forth) for which the behavior is most characteristic.

1. slurred speech, slow reaction time, impaired judgment, reduced coordination
2. intense emotional responses, anxiety, altered sensory perceptions
3. alertness, feelings of strength and confidence, rapid speech and movement, decreased appetite
4. drowsiness, intense feelings of well-being, relief from pain

Following are descriptions of behavior that are characteristic among users of certain classes of drugs. Name at least one drug that produces the described effects.

5. slurred speech, slow reaction time, impaired judgment, reduced coordination
6. intense emotional responses, anxiety, altered sensory perceptions
7. alertness, feelings of strength and confidence, rapid speech and movement, decreased appetite
8. drowsiness, intense feelings of well-being, relief from pain

Following are descriptions of hypothetical drugs. According to the Controlled Substances Act, under which drug schedule would each substance be classified?

9. This drug has a high potential for psychological dependence, it currently has accepted medical uses in the United States, and the distributor is not required to report to the U. S. Drug Enforcement Administration.
10. This drug has medical use in the United States, is not limited by manufacturing quotas, and may be exported without a permit.
11. This drug must be stored in a vault or safe, requires separate records keeping, and may be distributed with a prescription.
12. This drug may not be imported or exported without a permit, is subject to manufacturing quotas, and currently has no medical use in the United States.

The figure on page 143 shows a chromatogram of a known mixture of barbiturates. Based on the figure, answer one of the following questions.

13, Which barbiturate detected by the chromatogram had the longest retention time?
14. Which barbiturate had the shortest retention time?
15. What is the approximate retention time of amobarbital?

Do you like having multiple choices from which to select a response, or do you prefer everyone answering the same question? GB

 
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Engineering Industrial Waste Solutions

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Engineering Industrial Waste Solutions

(Engineering Industrial Waste Solutions)
Industrial & Hazardous Waste Management
This unit has assessed engineering principles applicable to industrial and hazardous waste management. Steps were evaluated for an adsorption system design using engineering principles and presenting engineering calculations for waste treatment.

The steps in the lesson were accomplished by the required reading of an article describing laboratory adsorption tests for lead and zinc removal. The lesson used the article’s data combined with engineering principles to design a prototype lead treatment system, and a required article presented a novel method for reducing leather tanning waste.

For this assignment, prepare a PowerPoint presentation that assesses engineering principles applicable to industrial and hazardous waste management by evaluating steps for an adsorption system design using engineering principles and presenting engineering calculations for waste treatment.

Specifically address the following items in your PowerPoint presentation.

  • Provide a title and introduction.
  • Summarize the Durga, Ramesh, Rose, and Muralidharan Required Unit Resources article.
  • List the steps required for design of a prototype adsorption system.
  • From Required Unit Resources, use the Yusuff and Olateju article’s equation (7) for the Radke-Prausnitz isotherm to evaluate qe for a Ce lead concentration of 10 mg/L. Show your calculation.
  • Explain how your value of qe determined from the equation compares to the value in Yusuff and Olateju’s article exhibit 10a. Do you think there is an error in the equation? Explain.
  • In the unit lesson, if the prototype’s wastewater flow is 500 gpd instead of 100 gpd and the influent lead concentration is still 10 mg/L, what would be the lead inflow rate in units of grams per day? Show your calculation.
  • Provide a summary of your PowerPoint information.

Your PowerPoint presentation must be at least 15 slides in length with a title slide and reference slide (title and reference slides do not count toward the minimum slide count). You should utilize at least the two Required Unit Resources: the Durga et al. and the Yusuff and Olateju articles. Ensure you refer to the unit lesson as you are creating your PowerPoint presentation.

Please adhere to APA Style when creating citations and references for this assignment. Do not include slide notes in your presentation. Be sure to use fonts that are large enough to view from a distance. This includes any fonts within images that you use. Be sure to cite and reference all information and images.

 
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OSHA Inspection Legal Procedures

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OSHA Inspection Legal Procedures

(OSHA Inspection Legal Procedures)

OSH 3525, Legal Aspects of Safety and Health 1

Course Learning Outcomes for Unit IV Upon completion of this unit, students should be able to:

6. Outline employer rights and responsibilities following an OSHA inspection. 6.1 Discuss an employer’s options to contest OSHA citations and penalties.

Reading Assignment OSHA’s Field Operations Manual (FOM): Chapter 7: Post-Citation Procedures and Abatement Verification Occupational Safety and Health Administration. (2011). Field Operations Manual. Retrieved from

https://www.osha.gov/OshDoc/Directive_pdf/CPL_02-00-159.pdf

Unit Lesson When an Occupational Safety and Health Administration (OSHA) inspection results in citations and penalties, employers can react in many different ways, including disbelief, anger, and confusion about what is required. However, there are some specific requirements that all employers must follow, and some options that are available under the Act. Employees also have some rights after the inspection is complete and citations and penalties have been issued. Many discussions about what can be done after an inspection has been completed are limited to employers, and the rights of employees are not considered.

The OSHA inspection process is supposed to be transparent to employees. This means that the employer has to post any citations that were issued by OSHA. The citations must be posted in the location where the violation(s) occurred, or nearby, and must remain posted for at least 3 days or until the violation(s) have been abated, whichever is longer. Some employers mistakenly believe that they do not have to post the citation notice if they are going to contest the citations. This belief is incorrect. The citation notice must be posted whether the employer is going to contest the citations or not. These posting requirements are specified in 29 CFR 1903.16. Employers can be further cited and penalized if they fail to post a copy of the original citations. Additionally, any abatement certification documents, abatement plans, progress reports, and a notice of informal conference made by the employer to OSHA

concerning the citations must be posted so employees can see the responses. The Act provides both employers and employees with certain rights after the completion of an inspection. These rights are designed to ensure that both the employer and employee have the ability to contest citations and penalties that they believe are unfair. There are several processes available ranging from informal discussions to formal legal proceedings. The employer may decide to simply accept and abate all the citations and pay the proposed penalties. If the

UNIT IV STUDY GUIDE

(OSHA Inspection Legal Procedures)

Employer Rights and Responsibilities after an OSHA Inspection

(US Dept. of Labor, 2011)

Employer chooses this option, they must complete the abatement prior to the abatement date specified in the Notice of Citations and Penalties and pay the penalty(ies). 29 CFR 1903.20 provides a process for both employers and employees (or their representative) to request an informal conference with the area director, or their representative. An employee may desire to have an informal conference because they believe their safety or health concerns were not adequately addressed by the OSHA inspection. An employer may desire the informal conference because they believe the citations and penalties were too harsh, because they do not understand some part of the citation or penalty, or to highlight some additional information about their health and safety program(s) to the area director that they believe may mitigate the severity of the citations and penalties. In some cases, the area director may agree to reduce the severity and/or amount of the penalty(ies). If this occurs, an informal settlement agreement may be reached and further litigation avoided.​

It should be noted that employees, or their representatives have the right to participate in any informal conference. This is the reason a notice of an informal conference must be posted in or near the area where citations occurred. Many health and safety experts recommend that an employer always request an informal conference after citations and penalties are issued. Employers must remember that the informal conference does not delay the 15 working days that the employer has to file a notice of contest. Therefore, the employer must schedule the informal conference early enough to allow time to file a Notice of Contest, if necessary. If the employer does not file a Notice to Contest within 15 working days, the citation becomes a final order. This means that the area director can no longer change the seriousness of citations or the penalties because they have become final orders.​

The ability of the employer or employee to formally contest citations, penalties, and abatement dates is extremely important for ensuring due process is provided. The contest process means the employer or employee does not have to accept the views of the compliance officer(s) and the area director without any ability to defend themselves or challenge what is perceived as an inadequate or over reactive response to an employee complaint. An employer or employee does not have to contest every citation and penalty. In fact, in most cases, only a portion of the citations and penalties are challenged. Once a formal notice to contest is filed, the case is in litigation and the area director cannot take any additional actions until the case is heard by an administrative law judge (ALJ) assigned to the case.​

There are many federal agencies that use ALJs. The ALJs that hear contested OSHA citations are from the Occupational Safety and Health Review Commission (OSHRC). The OSHRC was created along with OSHA after the Act was passed. It should be noted that the OSHRC is an independent organization, separate from OSHA and the Department of Labor. This separation was by design to make sure there is no undue influence over the OSHRC. This helps ensure the hearings are impartial. We will study the OSHRC and ALJs in more detail in Units VI and VII.​

The Citation and Notification of Penalty document will specify state abatement dates for each citation. The dates are set by the compliance officer performing the inspection based on his/her best estimate of the time required to complete the abatement. Employers have the right to formally petition for an extended abatement date if they believe they will not be able to meet the original date. 29CFR 1903.1 contains specific requirements for filing a Petition for Modification of Abatement Date (PMA).​

The final document OSHA requires for citations is abatement certification. Abatement certification is required for all citations that have become final orders, except “quick-fix” items that were corrected during the inspection. 29CFR 1903.19 contains specific requirements for abatement certifications. The regulation includes some more extensive documentation for more serious violations. The Citation and Notification of Penalty will typically specify which violations require additional certification. The area director may require an abatement plan to be submitted for some violations, especially if the abatement is complicated or may take an extended period of time. The area director may also require the abatement plan to include interim measures to protect employees during the extended abatement process. If an abatement plan is required, the employer may be required to periodically submit progress reports.

OSH 3525, Legal Aspects of Safety and Health 3

(OSHA Inspection Legal Procedures)

UNIT x STUDY GUIDE

Title

References Missling, T. (2011, July 28). US Department of Labor [Digital image]. Retrieved from https://flic.kr/p/afYuLP Occupational Safety and Health Administration. (n.d.). Purpose and scope, 29 CFR § 1903.1. Retrieved from

https://www.osha.gov/pls/oshaweb/owadisp.show_document?p_table=STANDARDS&p_id=9605 Occupational Safety and Health Administration. (n.d.). Posting of citations, 29 CFR § 1903.16. Retrieved from

https://www.osha.gov/pls/oshaweb/owadisp.show_document?p_table=STANDARDS&p_id=9621 Occupational Safety and Health Administration. (n.d.). Abatement verification, 29 CFR § 1903.19. Retrieved

from https://www.osha.gov/pls/oshaweb/owadisp.show_document?p_table=STANDARDS&p_id=9624

Occupational Safety and Health Administration. (n.d.). Informal conferences, 29 CFR § 1903.20. Retrieved

from https://www.osha.gov/pls/oshaweb/owadisp.show_document?p_table=STANDARDS&p_id=9628

Occupational Safety and Health Administration. (2011). Field Operations Manual. Retrieved from

https://www.osha.gov/OshDoc/Directive_pdf/CPL_02-00-159.pdf

Suggested Reading If you are interested in learning more about inspections and abatement, review the resources below: Occupational Safety and Health Administration. (n.d.). All about Occupational Safety and Health

Administration. Retrieved from https://www.osha.gov/archive/Publications/osha2056.html Occupational Safety and Health Administration. (n.d.). Employer rights and responsibilities following a federal

OSHA inspection. Retrieved from https://www.osha.gov/Publications/osha3000.pdf Occupational Safety and Health Administration. (n.d.). OSHA inspections. Retrieved from

https://www.osha.gov/Publications/osha2098.html Occupational Safety and Health Administration. (n.d.). OSHA’s abatement verification regulation. Retrieved

from https://www.osha.gov/Publications/Abate/abate.html Occupational Safety and Health Administration. (n.d.). Petitions for modification of abatement date. Retrieved

from https://www.osha.gov/pls/oshaweb/owadisp.show_document?p_table=STANDARDS&p_id=9619

Learning Activities (Non-Graded) OSHA has a hierarchy of controls that must be used for abatement of hazardous conditions. You can view OSHA’s Hierarchy of Controls at the website below: https://www.osha.gov/dte/grant_materials/fy10/sh-20839-10/hierarchy_of_controls.pdf Review the Hierarchy of Controls, and summarize the different types of abatement techniques that would fit into each category.

 
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Comparative Analysis of Energy

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Comparative Analysis of Energy

(Comparative Analysis of Energy)

Name:

 Date:

 Instructor’s Name:

 Assignment: SCIE211 Phase 4 Lab Report

 Title: Comparative Analysis of Energy

 Instructions: You will write a 1-page lab report using the scientific method.

When your lab report is complete, post it in Submitted Assignment files.

 Part I: Using the lab animation, fill in the data table below to gather your data, and use it to help you generate your hypothesis, outcomes, and analysis.

Energy Source Fuel (Coal)/Uranium Needed (tons) CO2 Emissions
(tons)		 Sulfur Dioxide and Other Emissions (tons) Radioactivity mSv (millisievert) Solid Waste (tons) Accidents
Coal
Nuclear

Part II: Write a 1-page lab report using the following scientific method sections:

  • Purpose
    • State the purpose of the lab.
  • Introduction
    • This is an investigation of what is currently known about the question being asked. Use background information from credible references to write a short summary about concepts in the lab. List and cite references in APA style.
  • Hypothesis/Predicted Outcome
    • A hypothesis is an educated guess. Based on what you have learned and written about in the Introduction, state what you expect to be the results of the lab procedures.
  • Methods
    • Summarize the procedures that you used in the lab. The Methods section should also state clearly how data (numbers) were collected during the lab; this will be reported in the Results/Outcome section.
  • Results/Outcome
    • Provide here any results or data that were generated while doing the lab procedure.
  • Discussion/Analysis
    • In this section, state clearly whether you obtained the expected results, and if the outcome was as expected.
    • Note: You can use the lab data to help you discuss the results and what you learned.

Provide references in APA format. This includes a reference list and in-text citations for references used in the Introduction section.

Give your paper a title and number, and identify each section as specified above. Although the hypothesis will be a 1-sentence answer, the other sections will need to be paragraphs to adequately explain your experiment.

When your lab report is complete, post it in Submitted Assignment files.

 
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Fundamentals of Epidemiology Knowledge

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Fundamentals of Epidemiology Knowledge

(Fundamentals of Epidemiology Knowledge)

Question 1 .

The first step in any epidemiological investigation is to ____.

Answer

understand causation establish risk factors track trends and determine if particular diseases are increasing or decreasing in the population describe the population demographically by age, race, sex, education, and other relevant indicators

Question 2 .

One of the important concepts from the Nuremberg Code is that of ____, which means that the subject understands the scope of the study and can make an informed decision to participate.

Answer

informed consent voluntary consent beneficence primary agent

Question 3 .

A disease or condition that affects a greater than expected (normal) number of individuals within a population, community, or region at the same time is referred to as an ____.

Answer

epidemic endemic outbreak epidemic threshold

Question 4 .

The normal occurrence of a disease or condition common to persons within a localized area is known as a(n) ____.

Answer

transmission pandemic endemic epidemic

Question 5 .

Reproductive health studies ____.

Answer

the role of genetics in disease development the occurrence and risk factors for disease such as cancer, heart disease, and diabetes that are slow to develop but span many years the distribution and risk factors for injuries, either accidental or intentional normal reproductive processes and problems that can occur including infertility, birth defects, and low birth weight

Question 6 .

The course of a disease, if left untreated, is referred to as ____.

Answer

transmission control measure natural history geographic pattern

Question 7 .

Physical, biological, social, cultural, and behaviors that influence health are known as ____.

Answer

risk factors health-related states agents determinants

Question 8 .

James Lind (1716-1794) observed the effect of time, place, weather, and diet on the spread of disease by ____.

Answer

comparing sick persons to well persons applying the germ theory to public health introducing randomization when conducting clinical trials applying the germ theory to hygiene practices

QUestion 9

The aspect of consistency means that ____.

Answer

an increasing amount of exposure increases the risk the association should be compatible with existing theory and knowledge the association is consistent when results are repeated in studies in different settings using different methods the findings agree with currently accepted understanding of pathological processes

QUestion 10

The modern epidemiologic triangle includes groups of populations, causative factors, and ____.

Answer

alternate explanations risk factors results coherence

Question 11

For chronic diseases, the time between exposure and symptoms is called the ____ period, which can range from a few months to many years.

Answer

latency incubation temporal plausibility

Question 12

Risk factors or exposures that we think might affect the outcome are known as ____.

Answer

indirect causes direct causes dependent variables independent variables

QUestion 13

Identifying diseases prior to the clinical stage means that prevention efforts can begin immediately. Because the disease is already present, this is an example of ____ prevention.

Answer

primary secondary tertiary quaternary

QUestion 14 The time between infection and clinical disease is referred to as a(n) ____.

Answer

a plausible period temporal period incubation period latency period

Question 15 .

A proportion measured over a period of time is known as a ____.

Answer

period prevalence prevalence proportion point prevalence rate

Question 16

The representation of a numerator as a fraction of a denominator is known as a(n) ____.

Answer

proportion rate incidence rate specific rate

Question 17 .

Prevalence equals ____.

Answer

incidence times duration of disease incidence divided by duration of disease incidence plus duration of disease incidence divided by duration of disease times 100

Question 18 .

While many people are used to hearing proportions represented as a percentage, many population samples in epidemiology are often presented per ____.

Answer

1,000 10,000 100,000 1,000,000

.Question 19 .

By definition, the disease or condition used to identify a case is determined by the ____.

Answer

hypothesis conclusion prevalence incidence

Question 20 .

A person in the population or study group identified as having the particular disease, health disorder, or condition under investigation is known as a ____.

Answer

person time case suspect case proportion

QUestion 21:

The number of new cases of disease in a specified time (usually one year) divided by the population “at-risk” to develop the disease is known as ____.

Answer

prevalence proportion incidence rate contingency case severity

Question 22 .

The number of existing cases of disease divided by the population is known as ____.

Answer

crude rate person time incidence rate prevalence proportion

Question 23 .

If a bacterium carries several resistance genes, it is called a ____.

Answer

multidrug resistant drug or super-drug multidrug resistant bacterium or superbug resistant bacterium or streptococcus bacterium killer bacterium or deadly bacterium

.Question 24 .

The disease carrier of most concern is known as a(n) ____, which is an infected person who never gets clinically ill, but can transmit the etiologic agent to others.

Answer

healthy or passive carrier pregnant carrier convalescent carrier active carrier

Question 25 .

____ is the transmission of a disease from mother to child during pregnancy or delivery.

Answer

Horizontal transmission Vertical transmission Lateral transmission Polar transmission

Question 26

There is ____ in the overall crude death rate in the United States from the year 1900 until 1996.

Answer

a definite increase a slight decrease hardly any change a clear decline

Question 27 .

The probability of death due to infectious disease in sub-Saharan Africa is ____%, but only ____% in developed countries, such as the United States.

Answer

22; 1.1 35; 10 66; 11 50; 22

Question 28 .

One of the most important emerging problems with the control of infectious diseases has to do with ____.Answer

deadly parasitic infections antibiotic resistant viral infections antibiotic resistant bacterial infections vaccine resistant viral infections

Question 29 .

A(n) ____ is an infected individual capable of transmitting disease during and after clinical disease.

Answer

convalescent carrier passive carrier active carrier inactive carrier

Question 30 . ____ is the transmission of a disease from person to person, and may be directly from one person to another, or indirectly from one person through an intermediate item to another person.

Answer

Horizontal transmission Vertical transmission Quick transmission Polar transmission

 
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Human & Environment Assignments

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Human & Environment Assignments

(Human & Environment Assignments)

Name ________________________ Sec. _________

Chapter 2: The Chemistry of Life

Guided Reading Activity

Module 2.6 pH is a measure of the acidity of a solution.

Answer the following questions as you read the module:

  1. A solution where water is the solvent is called a(n) solution.

  2. Label the diagram with the following terms: hydroxide ion and hydrogen ion.

  3. What are two negative effects of too much acid in nature?

  4. Complete the pH scale with the following terms/phrases: greater H+, lower H+, H+ = OH−.

  5. As the pH increases the [ H+ ] ____, and as the pH decreases the [ H+ ] ____.

A) decreases; increases
B) increases; decreases
C) increases; stays the same
D) decreases; stays the same

  1. Complete the following table regarding acids and bases.

 

Acids Bases
Effect on H+ when dissolved in H2O
pH range
Example

  1. The pH in your cells is dropping. You have buffers to minimize this change in pH. Briefly explain what the buffer would do in this situation with respect to the H+ concentration in your cells.

Guided Reading Activity

Module 2.7 All life on Earth is based on carbon.

Answer the following questions as you read the module:

  1. The element is essential to an organic compound.

  2. What is meant by the term carbon skeleton, and how can carbon skeletons vary?

  3. Is the following molecule an organic compound?

  4. The oxygen atom in ethyl alcohol forms a polar covalent bond with the carbon atom. Does ethyl alcohol readily interact with water? Hint: Revisit module 2.5 if necessary.

  5. Identify any functional groups from the following molecule.

  6. help to determine the overall properties of molecules.

  7. Complete the table that describes the four classes of large biological molecules.

 

Carbohydrates Proteins Lipids Nucleic acids
Example
Function of example

Guided Reading Activity

Module 2.8 Most biological macromolecules are polymers.

Answer the following questions as you read the module:

  1. Much of your mass consists of large biological molecules called .

  2. _________________ is the process by which polymers are broken into monomers.

A) Metabolism
B) Dehydration synthesis
C) Macromolecules
D) Hydrolysis

  1. A common polymer is starch. We break starch down for use as an energy source. Is starch digestion hydrolysis or dehydration synthesis?

  2. Complete the following diagram using the following terms: dehydration synthesis and hydrolysis.

  3. Which of the following best describes the following process: glucose + glucose → maltose + H2O?

A) Polarity
B) Hydrolysis
C) Metabolism
D) Dehydration synthesis

  1. Complete the following diagram illustrating dehydration synthesis and hydrolysis.

  2. is the total of all reactions that take place in your cells.

  3. How are dehydration synthesis and hydrolysis opposites of each other?

Guided Reading Activity

Module 2.9 Carbohydrates are composed of monosaccharides.

Answer the following questions as you read the module:

  1. Which of the following is not a characteristic of carbohydrates?

A) Energy source for animals
B) Inclusion of monosaccharides
C) Use as a structure in plants
D) All of the above

  1. The monomers of carbohydrates are .

  2. Glucose is a monosaccharide. Is glucose also a carbohydrate? Briefly explain your answer.

  3. Glucose and fructose both have the molecular formula C6H12O6, yet they are different molecules. Glucose and fructose are .

  4. Two monosaccharides joined by a dehydration synthesis would form a(n) . List two examples of a disaccharide.

  5. Complete the following illustration regarding monosaccharides and polysaccharides. Glucose is used to construct which polysaccharides?

  6. Complete the following table regarding monosaccharides and polysaccharides.

Human & Environment Assignments

Starch Glucose Cellulose Glycogen
Monomer or polymer
Function

Guided Reading Activity

Module 2.10 Lipids are a diverse group of hydrophobic molecules.

Answer the following questions as you read the module:

  1. The one feature common to all lipids is that they are .

  2. A tanker is carrying crude oil from Alaska to a port in California. During the trip, the ship’s hull is ruptured and it spills the crude oil into the Pacific Ocean. The oil sits on top of the water and does not mix with it. What characteristic must be true about the oil?

  3. A cell’s membrane consists, in large part, of a molecule called a phospholipid. Does a phospholipid “love” or “fear” water? Briefly explain your answer.

  4. Complete the following diagram of a phospholipid.

  5. The two layers of phospholipids that make up a cell’s membrane are arranged so that they are facing tail to tail. What would be the effect of this interior core of phospholipid tails? Hint: Keep in mind what you already know about phospholipid tails.

  6. True or false: Cholesterol is used within the cell to help maintain the structure of the cell’s membrane.

  7. Which of the following is not a lipid?

A) Triglycerides
B) Cholesterol
C) Anabolic steroids
D) All of the above

  1. Are both steroids and triglycerides in your body? If so, give a function performed by each.

Guided Reading Activity

Module 2.11 Your diet contains several different kinds of fats.

Answer the following questions as you read the module:

  1. There are two kinds of triglycerides. What are they?

  2. Which fatty acid tail from the following diagram is saturated? Which one is unsaturated? Briefly explain your answers.

  3. Saturated means that an object can hold no more of something. Briefly explain why the terms saturated and unsaturated are good descriptors for the molecules they describe.

  4. You are a biochemist working for a food manufacturer. You are working to identify a new fat you have discovered in a plant from a rainforest of Brazil. During your investigation, you determine that the fat tends to be a liquid at room temperature, and a biochemical analysis reveals too few hydrogen atoms for the amount of carbon that is present. What kind of fat have you likely discovered?

  5. An unsaturated fat can be turned into a solid or semi-solid state by __________________________.

A) omega-3 fatty acidification
B) hydrophilic
C) hydrogenation
D) unsaturation

  1. Two students are discussing triglycerides. One student tells the other that all fats are bad for your health. The second student disagrees with that statement. Which student is correct? Briefly explain your answer.

Guided Reading Activity

Module 2.12 Proteins perform many of life’s functions.

Answer the following questions as you read the module:

  1. A protein’s determines its function.

  2. _____ are the monomers from which large proteins are constructed.

A) Polymers
B) Amino acids
C) Polypeptides
D) Peptide bonds

  1. Identify the peptide bond in the following illustration.

  2. You are a biochemist working for a pharmaceutical company. You are identifying a new molecule you have isolated from a species of bat. You determine that the molecule contains a carboxylic acid group and a group of atoms that would give the molecule unique hydrophilic properties. The power goes out before you can finish your analysis. Based on what you know so far, what kind of molecule is it? What else might you have learned from it if the power had not gone out?

  3. True or false: Amino acids are joined together through a dehydration synthesis reaction forming a peptide bond.

  4. Complete the table on protein structure.

Human & Environment Assignments

Polypeptide Folded chain Multiple chains
Description

  1. Proteins serve many functions within your body. List three functions served by proteins in your body. Additionally, list a specific protein that performs that function.

  2. Protein shape is crucial to its proper function. Students have difficulty grasping this idea and how changing shape affects function. Briefly explain how the words tasty and nasty can serve as a good analogy for a teacher trying to explain this concept to students.

Guided Reading Activity

Module 2.13 Enzymes speed chemical reactions.

Answer the following questions as you read the module:

  1. A protein that speeds up chemical reactions is a(n) .

  2. True or false: A chemical reaction changes the shape of the enzyme permanently. If false, make it a true statement.

  3. Complete the following diagram regarding enzymes and substrates.

  4. Briefly explain what would happen if you altered the shape of an enzyme’s active site. Remember that an enzyme is a protein.

  5. The amount of energy needed to perform a chemical reaction is the __________________________.

A) activation energy
B) substrate energy
C) active site
D) inhibition site

  1. Complete the following diagram, which illustrates activation energy.

  2. In pole vaulting, the higher the bar is placed, the more difficult it is to clear it. Explain why this is a good analogy to help students understand enzymes and activation energy.

 
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Managing OSHA Compliance Challenges

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Managing OSHA Compliance Challenges

(Managing OSHA Compliance Challenges)

BOS 3525, Legal Aspects of Safety and Health Unit I to Unit VIII Assignment

We received a non-formal complaint recently from one of your current employees. The complaint alleges that employees there are performing welding operations on stainless steel in an area with inadequate ventilation.

This employee also states that they frequently “cough up” black sputum, and that they are worried about the health consequences caused by this lack of ventilation.

The complaint further states that no air sampling has been performed to evaluate the employees’ exposures to welding fumes. And, that when asked for respirators, they were given “dust masks” with one strap, which were purchased at the local hardware store. The effectiveness of these dust masks for the exposure that is present is also in question.

Part 1

Draft a letter in response to the complaint. Your letter should summarize why you believe the complaint is invalid and no on-site inspection is required. Keep in mind, simply stating that the complaint is invalid is not adequate. You must support your opinions in the letter.

Part 2

(Answer the following question on the page 2 of your word document) Answer the questions below in a few sentences.

1. Where does this type of complaint fit on OSHA’s Priority criteria?

2. What factors could have made this complaint non-formal rather than formal?

3. What steps could you take as the employer to identify the employee who filed the complaint? 4. What factors could result in this complaint being reclassified as a formal complaint?

Save both parts of this assignment in one word document to submit for grading.

Unit II Assignment

Discussion Question(Managing OSHA Compliance Challenges)

Question 1

Under what conditions can an employee be denied access to the opening conference, walk-around, and closing conference? Your response should be at least 75 words in length.

Question 2

If the OSHA compliance officer requests documents that are not related to a formal complaint, what options do you believe the employer has? Your response should be at least 75 words in length.

Question 3

If OSHA determines that an employer’s response to a non-formal complaint is adequate, what options does the employee filing the non-formal complaint have? Your response should be at least 75 words in length.

Question 4

Can an employee request that an attorney or union representative attend a private conference with the compliance officer? If the union demands to have a representative present, does the employee have to comply? Your response should be at least 75 words in length.

Unit II Assignment(Managing OSHA Compliance Challenges)

You receive a follow-up call from the area director saying the employee filing the original non-formal complaint has provided additional information about the alleged health situation and submitted a formal complaint using the OSHA-7 form, making the complaint a formal complaint. A few days later, an OSHA compliance officer shows up at your facility to perform a comprehensive inspection. The compliance officer presents the proper credentials, and you verify that the compliance officer is employed by OSHA and assigned to the local office.

During the opening conference, the compliance officer provides you with the formal complaint, alleging that employees are exposed to hazardous concentrations of metal fumes in welding areas of the plant, that you have not performed any air sampling to determine exposure levels, that adequate ventilation is not present in welding areas, and that adequate respiratory protection has not been provided to welders. As a part of the inspection, the compliance officer requests the following documents:

  •  Chemical inventory list;
  •  OSHA 300 logs;
  •  Hazard Communication Program, including training records;
  •  any sampling data that you have;
  •  Respiratory Protection Program, including medical clearance letters and training records;
  •  written hazard assessment for personal protective equipment (PPE) used at the facility;
  •  Safety Data Sheets (SDSs) for the metals you use in the production process and any welding rods/wire used in the welding area; and
  •  any other written programs you have that are required by an OSHA regulation.

The compliance officer takes a walk-through tour of the facility, spending extra time in the welding areas. During the walk-through, the compliance officer points out several issues believed to be apparent violations. The issues are as follows:

  •  Heavy haze is present in the welding area.
  •  Individuals wearing half-mask air-purifying respirators have full beards.
  •  Employees are using chemicals that could be injurious to the eyes, and no emergency eyewash is present.
  •  Eyewash is present in another area of the plant that is covered in dust, and there is no indication of recent operation or inspection.
  •  Employees are using chemicals that could be absorbed through the skin and are not using any gloves.
  •  Employees are performing maintenance inside a press with no lock-out/tag-out applied.
  •  No written lock-out/tag-out program is available at the time of the inspection.
  •  Welding operation is performed near flammable materials, and no fire watch present.
  •  There is no record of training for fork truck drivers.
  •  Extension cords are stretched across walkways.
  •  Three containers are present in the plant with no label present on any of the containers.
  •  An employee could not find a SDS for the chemical he or she was using.

The compliance officer asks for a private conference room and a list of non-managerial employees. He tells you that he intends to interview four non-managerial employees before leaving for the day. He also states that he will return the next day to collect some air samples at the facility.

You are worried about the number of citations and penalties that you may face. Provide a document summarizing the steps you would take as soon as the compliance officer leaves, and the steps you believe you could have taken during the walk-through that may have resulted in a quick-fix penalty reduction.

Your document must be at least three pages in length, not counting the title or reference pages. You must also include at least one reference using appropriate APA style.

Information about accessing the Blackboard Grading Rubric for this assignment is provided below.

Unit III Assignment(Managing OSHA Compliance Challenges)

You receive a document (linked below) by certified mail. After reading the document, prepare a response that summarizes the approach you would take to the citations and penalties that have been proposed. Be sure to include the following in your response:

  •  Steps you are required to take,
  •  Options available to you,
  •  Contacts you would make, and
  •  Documentation necessary to respond to the citations and penalties.

Your response must be a minimum of two pages in length, using at least one reference. All sources must be cited and a reference provide using APA style.  Click here to access the OSHA citation document for this assignment. Information about accessing the Blackboard Grading Rubric for this assignment is provided below.

Unit IV Assignment(Managing OSHA Compliance Challenges)

Based on the Citation and Notification of Penalty letter you received in Unit III, prepare a document that summarizes at least five actions you would take as soon as possible after you reviewed the letter. For each of the actions, you must state the following:

  •  the exact action,
  •  why you believe the action is required for the citations and penalties,
  •  how you believe the actions will assist in responding to the citations and penalties, and
  •  resources you would use to accomplish the action.

You must support your actions with reliable sources. Your response must be a minimum of two pages in length, using at least one reference. All sources must be cited, and a reference must be provided using APA style.

Information about accessing the Blackboard Grading Rubric for this assignment is provided below.

Unit V Assignment(Managing OSHA Compliance Challenges)

You managed to schedule an informal conference with the area director at the regional OSHA office four days after you receive the Notice of Citations and Penalty. Based on the citations and penalties you received in Unit III, prepare a document that lists the citations and penalties you wish to discuss with the area director.

You should summarize what you are trying to accomplish in regard to each citation/penalty you choose, to include:

  •  The information you will use to try and accomplish your goal,
  •  The information you will take with you to the meeting, and
  •  Who will accompany you to the meeting.

You must support your actions with reliable sources. Your grade will be based on your ability to present a case to your professor (serving as the area director) to reduce either the severity of some citations, or the amount of some penalties. If you simply state that you accept the citations and penalties as written, you will receive a minimal score on the assignment.

Your response must be a minimum of two pages in length, not including the title page and reference page. You must use at least one reference in the paper. All sources must be cited in the text and on the reference page, using APA style.

 

Unit VI Assignment(Managing OSHA Compliance Challenges)

You fail to reach an informal settlement agreement with the area director. You file a Notice to Contest within the required 15-day period. Your case is assigned to an administrative law judge (ALJ). Prepare a document summarizing the case you will submit to the ALJ. The document should discuss the following at a minimum:

  •  Which citations and penalties you would contest,
  •  the reasoning behind each contested citation and/or penalty,
  •  Documents you would bring to the hearing,
  •  Individuals you would use at the hearing,
  •  How the case before the ALJ differs from the informal conference,
  •  What information will be presented before the ALJ that was not presented in the informal conference, and
  •  What information you would request from OSHA as part of discovery.

You must support your actions with reliable sources. Your grade will be based on your ability to present a case to your professor, serving as the ALJ, to reduce or vacate either the severity of some citations or the amount of some penalties. If you simply state that you accept the citations and penalties as written, you will receive a minimal score on the assignment.

Your response must be a minimum of two pages in length, using at least one reference. All sources must be cited in the text and on the reference page, using APA style.

Unit VII Assignment(Managing OSHA Compliance Challenges)

Assume that a fatality occurred at your facility one month prior to the OSHA inspection. Review the citations and penalties that were assessed to your facility, and respond to the following questions:

• Which of the citations could be referred to the U.S. DOJ for criminal proceedings?

• What conditions would have to be met before the citations could be referred for criminal proceedings?

• Which individuals working at your facility could face criminal charges under the Act?

• What would be the maximum prison sentence and fines that any individual would face?

• What would be the maximum fine that the company would face?

• If you were facing criminal charges under the Act, what would be your best defense?

• How could you involve the OSHRC in the criminal case(s)?

Your response must be a minimum of two pages in length, using at least one reference. All sources must be cited in the text and on the reference page, using APA style.

Unit 8- Question Answer

1. Summarize the procedures required to achieve Star status under OSHA’s Voluntary Protection Program (VPP).

2. Describe the role that Challenge Administrators play in the OSHA Challenge voluntary cooperative program.

3. Provide your opinion as to which OSHA voluntary cooperative program would be the most beneficial to a small business that prints business cards and letterhead.

4. Discuss the benefits that OSHA alliances provide to employers and workers in general industry.

 
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