PhysicsLAB: MCAS 2017 Session 2

PhysicsLAB

MCAS Physics Exams
MCAS 2017 Session 2

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A. 5 JB. 20 JC. 80 JD. 400 J

A. It creates a large resistance to oppose the flow of electricity.
B. It rotates a coil of wire through a magnetic field to produce a current.
C. It uses side-by-side coils of wire to transform a voltage to a safe level.
D. It transmits a signal to a circuit breaker to protect its components.

A. 10 m/s leftB. 10 m/s rightC. 25 m/s leftD. 25 m/s right

A. The driver is not close to the speaker.
B. The driver is not moving fast enough.
C. The driver is moving away from the speaker.
D. The driver has the windows of the truck closed.

A. A go-cart races at 50 km/hr around a circular track.
B. A bicycle slows down as it approaches an intersection.
C. A truck travels north at 70 km/hr on a straight road.
D. A car steadily speeds up after a traffic light turns green.

A. The object has a constant speed.
B. The object has a positive acceleration.
C. The object has a negative acceleration.
D. The object has a negative displacement.

A. Wave WB. Wave XC. Wave YD. Wave Z

A. 980 NB. 1100 NC. 1200 ND. 1220 N

A. The current increases and the bulb’s light becomes dimmer.
B. The current increases and the bulb’s light becomes brighter.
C. The current decreases and the bulb’s light becomes dimmer.
D. The current decreases and the bulb’s light becomes brighter.

A. Some of the water molecules have a lower specific heat than other molecules in the air.
B. Some of the mass of the water molecules decreases as the molecules fall toward the ground.
C. Some of the thermal energy of the water molecules is transferred to other molecules in the air.
D. Some of the water molecules gain gravitational potential energy while falling toward the ground.

A. the arrangement of the circuit
B. the power rating of the battery
C. the voltage across this resistor
D. the values of the other two resistors

A. Light waves can be observed, but sound waves cannot be observed because sound waves are absorbed by Earth’s atmosphere.
B. Light waves can be observed, but sound waves cannot be observed on Earth because sound waves cannot travel through space.
C. Neither light waves nor sound waves can be observed, because both types of waves are absorbed by matter before reaching Earth.
D. Both light waves and sound waves can be observed, but the sound waves take longer to reach Earth because light travels faster than sound.

A. It will accelerate as it travels in a straight line.
B. Its path will bend upward toward the negatively charged plate.
C. It will maintain its original speed as it travels in a straight line.
D. Its path will bend downward toward the positively charged plate.

A. interval WB. interval XC. interval YD. interval Z

A. electromagnetic wavesB. fluid motionC. mechanical wavesD. particle contact

A. The temperature of the liquid increases.
B. The temperature of the liquid decreases.
C. The specific heat of the liquid increases.
D. The specific heat of the liquid decreases.

A. the force of air resistance acting on the car
B. the force of inertia propelling the car forward
C. the centripetal force from friction acting on the car’s tires
D. the applied force from the car’s engine turning the wheels

A. Medium Z is most likely a gas.
B. Medium Y is most likely a solid.
C. Medium W and medium X are most likely liquids.
D. Medium W is most likely a gas and medium X is most likely a liquid.

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 four questions.

a. Determine the average speed of the object for the time interval 0−2 s. Show your calculations and include units in your answer.

b. Describe how the speed of the object is changing as it passes through point S. Explain your answer.

c. Identify the point (S, T, or U) at which the velocity of the object is equal to zero. Explain your answer.

d. Determine the distance moved and the displacement of the object for the time interval 0−4 s. Explain your answer.

Refer to the following information for the next four questions.

a. Calculate the period, T, of the beep. Show your calculations and include units in your answer.

The sound of the beep travels through air at 340 m/s.

b. Calculate the wavelength of the beep. Show your calculations and include units in your answer.

The child presses the button and pushes the toy car away. The car moves 5 m before it stops. It continues to beep, even after it stops moving.

c. Describe what happens to the amplitude of the beep observed by the child as the car moves away from the child.

d. When does the child hear a beep with a frequency lower than 500 Hz? Explain your answer.

Refer to the following information for the next four questions.

a. Calculate the work performed by the winch to lift the trap. Show your calculations and include units in your answer.

b. Calculate the power supplied by the winch to lift the trap. Show your calculations and include units in your answer.

The winch then lifts a second trap.

c. Explain how the winch could perform the same amount of work but supply a greater amount of power when lifting the second trap.

d. Explain how the winch could supply the same amount of power but perform a different amount of work when lifting the second trap.

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