PhysicsLAB: MCAS 2012 Session 2

PhysicsLAB

MCAS Physics Exams
MCAS 2012 Session 2

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A. decrease in temperature.
B. become negatively charged.
C. demagnetize the bar magnet.
D. have an electric current.

A. dishwasher
B. air conditioner
C. laptop computer
D. clock radio

A. 0.60 VB. 1.7 VC. 8.0 VD. 15.0 V

A. Kinetic energy increases as the mallet reaches its highest point.
B. Potential energy decreases as the mallet reaches its highest point.
C. Kinetic energy converts to potential energy as the mallet falls toward the target.
D. Potential energy converts to kinetic energy as the mallet falls toward the target.

A. Student X will receive sound waves with a frequency higher than 10 kHz.
B. Student X will receive sound waves with a frequency lower than 10 kHz.
C. Student Y will receive sound waves with a frequency higher than 10 kHz.
D. Student Y will receive sound waves with a frequency lower than 10 kHz.

A. The pieces of cloth repel each other.
B. The pieces of cloth attract each other.
C. A continuous current flows between the pieces of cloth.
D. There is no electric interaction between the pieces of cloth.

A. Only bulb 1 will be lit.
B. Only bulb 3 will be lit.
C. All three bulbs will be lit.
D. None of the bulbs will be lit.

A. 0.3 ΩB. 2.5 ΩC. 3.5 ΩD. 30 Ω

A. WB. XC. YD. Z

A. heating corn kernels in a hot air popper
B. heating corn kernels in a microwave oven
C. heating corn kernels in a foil pan on a hot plate
D. heating corn kernels in oil in a pot on an electric stove

A. a copper belt and a plastic sphere
B. a rubber belt and a plastic sphere
C. a copper belt and an aluminum sphere
D. a rubber belt and an aluminum sphere

A. Wave X has half the amplitude of wave Y.
B. Wave X has twice the amplitude of wave Y.
C. Wave X has a lower frequency and longer wavelength than wave Y.
D. Wave X has a higher frequency and shorter wavelength than wave Y.

A. The car is initially at rest and then backs up for 10 s.
B. The car moves 20 m in the first 10 s and then stops.
C. The car travels at a constant speed for 10 s and then decelerates until it stops.
D. The car travels at a constant speed of 20 m/s and then decelerates until it is traveling at a constant speed of 15 m/s.

A. 6.7 kg • m/sB. 60 kg • m/sC. 90 kg • m/sD. 200 kg • m/s

A. 800 NB. 1000 NC. 1400 ND. 2000 N

A. low wave speedB. short wavelengthC. low wave frequencyD. small wave amplitude

A. crude oilB. distilled waterC. solid steelD. warm air

A. the speed of the car
B. the velocity of the car
C. the potential energy of the car
D. the distance traveled by the car

Open-Response Questions

BE SURE TO ANSWER AND LABEL ALL PARTS OF THE QUESTION.
Show all your work (diagrams, tables, or computations) in your Student Answer Booklet.
If you do the work in your head, explain in writing how you did the work.

Refer to the following information for the next three questions.

a. Identify whether audio only, video only, or both audio and video of the fireworks will be recorded by each camera.

b. Explain each of your answers for part (a). Suppose a camera records both audio and video.

c. Will the light or the sound from the fireworks be recorded first? Explain your answer.

Refer to the following information for the next three questions.

a. Construct a free-body force diagram that represents the forces acting on the box when it is 1.0 m above the floor. Be sure to label your diagram.

b. Explain how you know that work is being done on the box, and how the work results in a change in the energy of the box.

c. Calculate the amount of work done on the box and the change in potential energy of the box. Show your calculations and include units in your answer.

Refer to the following information for the next three questions.

a. Describe what happens to the temperature of the can of juice and the temperature of the water in the container within the first few minutes after the can is submerged. Explain your answer.

b. After four hours, will the can and the water have the same temperature or different temperatures? Explain your answer.

c. Estimate the numerical value(s) of the final temperatures of the can of juice and the water after four hours. Explain your answer.

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