Exhibit 20-1

You have two metal spheres on insulating stands. You bring them each in turn near the ball of a positively charged electroscope. In each case the deflction of the leaves is reduced slightly. You then bring them each in turn near the ball of a negatively charged electroscope and find that sphere A causes the deflection to increase, whereas sphere B causes it to decrease.

7.Refer to Exhibit 20-1. Sphere A is

a. positively charged.

b. negatively charged.

c. neutral.

d. There is not enough information to determine this.

8.Refer to Exhibit 20-1. Sphere B is

a. positively charged.

b. negatively charged.

c. neutral.

d. There is not enough information to determine this.

9.A metal sphere on an insulating stand has a charge of 16 nC. A second metal sphere, also on an insulating stand, is initially uncharged. The two spheres are briefly touched together. The second sphere is then grounded. After this procedure, the charge on the original sphere is

a. 16 nC

b. 8 nC

c. 4 nC

d. 0 nC

e. more than 16 nC

f. There is not enough information to determine this

1. Which of the following statements are IMPOSSIBLE? Choose all that apply.

A perfectly functioning hydraulic had a pressure of 38 psi in the fluid near the small piston and a pressure of 38 psi in the fluid near the big piston.

A 25 L container displaced 25 L of orange juice when fully submerged.

A substance underwent condensation during which its temperature remained constant at 45 °C.

A 37 N brick was fully submerged in water. The buoyant force on the brick was 37 N. As a direct result, the brick sank.

Last Tuesday, the Sun heated the Moon via conduction.

The temperature inside a physics laboratory chamber was measured to be 5 °F.

2. Which one of the following statements describes an object moving at a CONSTANT VELOCITY?

A spaceship traveled at a constant speed while making a right turn

The truck accelerated while making a u-turn.    

A moped traveled at a constant speed along a straight line path.

A car slowed down while making a left turn.

The motorcycle sped up from 45 mph to 61 mph while moving in a straight line.

my bacteria is streptococcus pyogenes

1. Choose one species of bacteria on the "Choose Your Bacterium" wiki page.
2. Prepare a wiki addressing all areas shown on the example wiki page.

   Culture Requirements:

   Culture Requirements:

3. Media: sheep blood agar supplemented with 5% malted barley extract
4. Atmosphere: 10% oxygen and 20% carbon dioxide
5. Temperature: 30 - 35 ^oC

6. Biochemical Test Reactions: [include photos of these in your wiki]

7. catalase positive
8. oxidase negative
9. etc.

10. Interesting or Unusual Characteristics:

11. This organism can be found growing near craft breweries.

12. Infections / Disease Associations:

13. meningoencephalitis
14. endocarditis

15. Mode(s) of Transmission:

16. fecal/oral

17. Treatment:

18. amoxicillin
19. 5% ethanol

20. References:

21. absenteeitis
22. Atmosphere: 10% oxygen and 20% carbon dioxide
23. Temperature: 30 - 35 ^oC

24. Biochemical Test Reactions: [include photos of these in your wiki]

25. catalase positive
26. oxidase negative
27. etc.

28. Interesting or Unusual Characteristics:

29. This organism can be found growing near craft breweries.

30. Infections / Disease Associations:

31. meningoencephalitis
32. endocarditis
33. absenteeitis

34. Mode(s) of Transmission:

35. fecal/oral

36. Treatment:

37. amoxicillin
38. 5% ethanol

39. References:

A small businessman is planning on opening a new retail location. Three locations are available, and he is interested in the annual income of families near each location. A random sample of 4 families is selected near each location, and the results are shown below (in thousands of dollars). Use this data to test the hypothesis that mean income is the same in all three areas.

a) What is the critical value at the 0.01 significance level?

For full marks your answer should be accurate to at least two decimal places.

Critical value: 0

b) What is the F statistic?

For full marks your answer should be accurate to at least two decimal places.

F statistic: 0

Fluid Mechanics: A water tank is a cylinder 4 m in height and 2 meters in diameter. The tank is full at time t_o. The tank sits on a platform 12 m tall. A water tap is located at the bottom center of the tank. The tap, when actuated, opens to a pipe 5 cm in radius.

a.       Write down Bernoulli’s equation. Identify the Pressure, Kinetic and Potential Energy terms. Show that each has the units of an energy density (Joules/Volume).

b.       Use Bernoulli’s equation to compare the difference in pressure between the surface of the water and the bottom of the tank near the edge? Assume the fluid is motionless near the edge.

c.       When a tap is opened water rushes in to a pipe 5 cm in radius. The pipe is straight and drops 12 m to ground level, but along the way slowly in radius to 2 cm. What is the speed of the water as it emerges from the pipe?

d.       Use the continuity equation to find the speed of the water as it enters the pipe 12 m above, i.e. bottom of the tank.

e.       What is the volume and mass flow rate of the stream of water?

f.        What is the pressure of the fluid as it enters the pipe, again at the bottom of the tank.

Select the answers which complete the statements below (e.g., if answer A completes the first statement, and answer B the others, enter ABBBB). A) positive B) negative C) neutral D) cannot tell

A positively charged glass rod repels an object suspended by a non-conducting thread. The charge on the object is ____ .

A positive point charge is brought near the outside surface of a neutral conducting sphere and released. The initial position of the point charge is on the positive x axis and the sphere is centred on the origin. The point charge moves in the ____ x direction. (If the point charge does not move, select answer C.)

A negatively charged glass rod attracts an object suspended by a non-conducting thread. The charge on the object is ____ .

A positively charged ball is brought close to a neutral isolated conductor. The conductor is then grounded, while the ball is kept close. If the ground connection is first removed and then the ball is taken away, the conductor has a ____ charge.

Two neutral metal spheres are mounted on insulating supports. They are connected by a wire. A positively charged glass rod is brought near sphere 1. The wire connecting the spheres is removed and the charged rod is then taken away. Now the charge on sphere 1 is ____ .

Problem 2: You operate your own small building company and have decided to bid on a government contract to build a pedestrian walkway in a national park during the coming winter. The walkway is to be of standard government design and should involve no unexpected costs. Your present capacity utilization rate is moderate and allows sufficient scope to understand this contract, if you win it. You calculate your incremental costs to be $268,000 and your fully allocated costs to be $440,000. Your usual practice is to add between 60% and 80% to your incremental costs, depending on capacity utilization rate and other factors. You expect three other firms to also bid on this contract, and you have assembled the following competitor intelligence about those companies. Issue Rival A Rival B Rival C Capacity Utilization At full capacity Moderate Very low Goodwill Considerations Very concerned Moderately concerned Not concerned Production Facilities Small and inefficient plant Medium sized and efficient plant Large and very efficient plant Previous Bidding Pattern Incremental cost plus 35-50% Full cost plus 8-12% Full cost plus 10-15% Cost Structure Incremental costs exceed yours by about 10% Similar cost structure to yours Incremental costs 20% lower but full costs are similar to yours Aesthetic Factors Does not like winter jobs or dirty jobs Does not like messy or inconvenient jobs Likes projects where it can show its creativity Political Factors Decision maker is a relative of the buyer Decision maker is seeking a new job Decision maker is looking for a promotion Show all of your calculations and processes. Describe your answers in three- to five-complete sentences. a.What price would you bid if you must win the project? b.What price would you bid if you want to maximize the expected value of the contribution from this contract? c.Defend your answers with discussion, making any assumptions you feel are reasonable and/or are supported by the information provided.

Required

   (a)       Using the above data, compute the gross profit to be recognised for each of the three years, assuming that the outcome of the contract can be reliably estimated.  

   (b)   Prepare the journal entries for the 2015 financial year using the percentage-of-completion method.

   (c)   Prepare the journal entries for the 2015 financial year, assuming the stage of completion cannot be reliably assessed.

Sun City Limited commences construction of a multi-purpose water park on 1 July 2014 for Pretoria Limited. Sun City Limited signs a fixed-price contract for total revenues of $50 million. The project is expected to be completed by the end of 2017 and Pretoria Limited controls the asset throughout the period of construction. The expected cost as at the commencement of construction is $38 million. The estimated costs of a construction project might change throughout the project—in this example, they do change. The following data relates to the project (the financial years end on 30 June): Required (a) Using the above data, compute the gross profit to be recognised for each of the three years, assuming that the outcome of the contract can be reliably estimated.   (b) Prepare the journal entries for the 2015 financial year using the percentage-of-completion method. (c) Prepare the journal entries for the 2015 financial year, assuming the stage of completion cannot be reliably assessed.

Eric and Pat are baseball fans. They drove to the local stadium in Eric's car to watch a game, and decided to park in the parking garage. When driving into the parking garage, they were required to take a ticket in order to get access to the garage. The cost for parking the car was $15.00, which was not due until exiting the garage. After taking the ticket, they parked the car and then walked across the street to the game. When the game was over, they walked back to the car. Upon approaching Eric's vehicle, they noticed that one of the windows had been smashed in. Everything inside had been taken, including Pat's work laptop which had been sitting in a bag in the backseat of the car. Eric and Pat were upset that the parking garage security didn't notice and prevent this crime from happening. Eric and Pat filed a lawsuit against the company that runs the parking garage. The company (ABC Co.) defended, stating that on the back of the ticket is a clause which states the following in conspicuous lettering: "ABC Co. is not liable for any loss of contents or damage caused to vehicles parked in the garage due to its own negligence or the actions of any other person." Will the court uphold the clause on the parking ticket? Make sure to fully explain your answer. This means including the law that applies and the reasoning in applying that law.