Experiment 2: Static Materials
In this experiment, you will investigate the phenomenon of static electricity of various materials.

Materials
Electrostatics Kit Materials
*Paper (Any Kind)
*Flat Work Surface     

  
Procedure
1.   Tear the paper into small pieces (approximately the size of a hole-punch) and scatter them in a small area on a table or flat surface.
2.   Choose one plastic strip (acetate [light blue and transparent], vinyl [no color and transparent], or polyethylene [white and translucent]) and one fabric (wool or cotton cloth) from the electrostatics kit.
3.   Quickly rub the fabric up and down the length of the plastic strip for approximately 20 seconds.
4.   Bring the plastic strip near the small, torn pieces of paper.
5.   Record observations about the amount picked up and behavior of the paper in Table 2.
6.   Repeat Steps 2 – 5 for five additional fabric and plastic combinations.

Table 2: Static Electricity Properties of Various Materials

  
    Post-Lab Questions

1.   What happens when you bring the charged plastic strip near the paper pieces? Why does this happen?

2.   Draw a free body diagram of the forces acting on the piece of paper.

3.   Why does the electric force easily overcome the force of gravity and lift the paper off the surface without even touching the paper?

4.   Which of the materials pick up positive charge and which pick up negative charge? How did you determine this?

5. Today Van de Graaff accelerators sometimes serve as “injectors” for other types of accelerators that then further increase the energy of the particles. Consider a Van de Graaff accelerator that is being used to accelerate protons. The high voltage terminal (metal sphere) of the Van de Graff is charged using a rubberized belt that is 30 cm wide and travels at a velocity of 20 m/s. Charge is sprayed onto the belt near the roller at the low voltage end and removed from the belt near the upper roller inside the high voltage terminal. The belt is given sufficient surface charge density at the lower roller to cause an electric field of 1.0 MV/m (i.e. approaching the breakdown field of air at atmospheric pressure which is ~ 3 MV/m) on each side of the belt. (a) What is the charging current delivered to the high voltage terminal in µA? Suppose we would like to accelerate the protons to an energy of 3 MeV. Take the radius of the spherical high voltage terminal to be the such that the electric field at the surface of the sphere just below the breakdown field of air (b) How long does it take to charge the high voltage terminal of the Van de Graaff from zero volts to 3 MV? The beam of 3 MeV protons is focused onto a lithium target. The beam is equivalent to a current of 5 µA. (c) At what rate do protons strike the target? (d) At what rate is energy (heat) produced in the target? (e) Would you consider the Van de Graaff a ‘source of emf ? Why or why not?

Select the experiments that use a randomized comparative design.

Environmental scientists are concerned with the effects of nitrogen on the drinking water supply. Hundreds of farmers have volunteered to participate in the study in exchange for free fertilizer. The scientists assign the low-nitrogen blend to 25 randomly chosen farms near rivers, creeks, and tributaries and assign the normal blend to 25 randomly chosen farms not near such bodies of water. The scientists then compare mean biomass production in grams per square meter during the growing season.

Participants in a study to determine the effects of a new cholesterol drug are divided into groups based on gender. All males receive the new drug, and all females receive a currently approved drug.

A gas company offers three plans to customers. The company randomly chooses 200 customers who have signed up for each of the three plans. It then compares their gas bills over six months to determine which plan saves customers the most money.

To test a new epidermal treatment on fish in polluted pond water, 60 fish with epidermal abrasions from the same pond are randomly placed into three groups. One group receives the new treatment, another group receives the existing treatment, and the third group receives no treatment.

Students have volunteered to participate in a study of the effects of caffeine on memory. A computer program assigns each student at random to drink either a caffeinated or a decaffeinated beverage. The students are then given a list of 20 different objects to study for one minute and asked to write down as many of the new objects as they can remember.

1. Electric charge is

2.

After rubbing a plastic ruler with a felt cloth, the ruler becomes negatively charged because:

4.  

Metals are typically ______________,
they allow charge to move freely.
Materials like wood, rubber, and plastic are _______________,
they do not allow charges to move freely.

5.

When a negatively-charged object is brought close to a neutral conductor, but does not touch it, what happens?

The coronavirus is hitting businesses and their employees. Some businesses are still open and millions of employees are working to serve customers. Some of the employees work in their workplaces while some others work from home. Almost all employees worry whether they will lose their jobs or if they will have a pay cut. It is obvious that unemployment will rise because millions of employees will lose their jobs and the remaining employees may have a pay cut (10, 20, 30, 50%) depending on the position in his/her workplace.

Because of the coronavirus, the business environment has started to change. It is becoming a challenging fast-changing environment. Currently, many managers are faced with difficulties. In the near future and in the long run, they will need to deal with important issues.

Lastly, you have to remember that one can easily manage firms during prosperous times but effective managers flourish during difficult times.

Below is a sample list of terms that you can use when answering the question

Job security and protection; Employee morale; Employee stress; Anxiety; Employee wellness; Effective decision making; Work performance; Key competencies; Productive employees; Quality of work produced; Work-life balance; Mental health; Employees in a high-risk health category; Illness; Government sector; Health sector; Security forces.

1-What should managers do to manage employees and minimize the negative effects of the coronavirus on employees? Discuss the major OB issues faced by managers when dealing with employees who are currently working and the major OB issues that managers need to handle in the near future.

Plant acquisitions for selected companies are as follows.

1. Pina Industries Inc. acquired land, buildings, and equipment from a bankrupt company, Torres Co., for a lump-sum price of $966,000. At the time of purchase, Torres’s assets had the following book and appraisal values.

To be conservative, the company decided to take the lower of the two values for each asset acquired. The following entry was made.

2. Grouper Enterprises purchased store equipment by making a $2,760 cash down payment and signing a 1-year, $31,740, 10% note payable. The purchase was recorded as follows.

3. Monty Company purchased office equipment for $18,700, terms 2/10, n/30. Because the company intended to take the discount, it made no entry until it paid for the acquisition. The entry was:

4. Flounder Inc. recently received at zero cost land from the Village of Cardassia as an inducement to locate its business in the Village. The appraised value of the land is $37,260. The company made no entry to record the land because it had no cost basis.

5. Culver Company built a warehouse for $828,000. It could have purchased the building for $1,021,200. The controller made the following entry.

Prepare the entry that should have been made at the date of each acquisition.

Create the 2018 budget for Buy-Right Bike Store (BRBS). Add a worksheet to your Project Excel workbook for BRBC Budgeted Income Statement and create the 2018 budget using the following information.

Budgeted Sales of Bike C: Online 75,000 bikes; instore 5,000 bikes.

Bike C is purchased from Built-Right Bike Company, a sister company in the Biltmore Bicycle Corporation (BMBC), for $52 and is sold for $104.

Inventory:

Beginning inventory:      $    52,000

Purchases                            4,108,000

Sales                                                  ?

Ending Inventory             $     52,000

Employees:

Managerial Staff:

Manager: 1 FTE, $45,000 annual salary plus 20% benefits

Bookkeeper: 1 FTE, $40,000 annual salary plus 20% benefits

Purchasing & Receiving Supervisor: 1 FTE, $35,000 annual salary plus 20% benefits

Other staff:

Warehouse: 2.5 FTEs make $15 per hour plus 17% benefits

Online sales staff: 2 FTEs, $15 per hour plus 17% benefits (no commission)

Store Hours:

Monday – Saturday 10:00 am – 6:00 pm

2 sales clerks work from 10-3 M-F

3 sales clerks work from 3-6 M-F

4 sales clerks work 10-6 on Saturdays

Sales clerks earn $15 per hour plus 17% benefits

Instore sales staff share commission equal to 10% of instore sales.

Budgeted Utility cost: $13,200

Budgeted Marketing Cost: $175,000

Contributions & community service: 10% of instore revenue

Other costs (includes depreciation, insurance, etc): $1,300,000

Income tax 29% of Net Revenue

Model constructing an income statement and balance sheet for a furniture company based on the following transaction details. Please clearly show which transactions fall under the following parts of the statement:

Sales

Cost of Sales

SG&A Expenses

Interest Income

Income Expense

Loss on Sale of Non-Current Asset

Transactions

1. Buy wood to build bookshelves- $500
2. A recently hired team member builds the bookshelves and should be paid - $25
3. Paid electricity bill for shop where bookshelves are made - $100
4. Paid team member who built the bookshelves - $25
5. Sold moving truck - $2500 (cash) (depreciation charge to date is $500; truck had an accumulated depreciation of $1000 at the time of sale)
6. Sold 2 bookshelves for $200 each (the total cost to make the bookshelves was $75 each)
7. Completed a subscription service from prior year - $4000
8. A count of manufacturing inventory shows $200 of raw materials on hand, $100 of work in process and completed making $300 worth of bookshelves
9. File cabinets depreciated - $75
10. Paid interest on a bank loan - $1000
11. Recorded the portion of the prepaid workshop insurance from the previous year - $50
12. Collected interest income - $20

Opening Balances

1. Cash - $2000
2. Inventory stock - $1000
3. Materials - $0
4. Work in Process - $0
5. Finished Goods - $0
6. Total Inventory -
7. Accounts Receivable - $5000
8. PP&E - $4000
9. Prepayments - $1000
10. Accrued Income - $10
11. Accounts Payable - $2000
12. Tax Payable - $0
13. Dividend Payable - $0
14. Accrued Liabilities $300
15. Bank Loan - $25000
16. Share Capital - $10000
17. Retained Earnings - $12,000