Practice Quiz

MCAS Physics Exam Practice - Question List

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26. The momentum of an object in space is
  1. dependent on its mass.
  2. independent of its inertia.
  3. independent of its velocity.
  4. dependent on its potential energy.
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27. Which of the following is an example of heat transfer by conduction?
  1. sunlight heating a floor
  2. an electric stove heating an iron pan
  3. a wood stove heating nearby objects through electromagnetic waves
  4. an electric heater heating air, which rises and is replaced with cooler air
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28.

In a competition, weightlifter 1 lifts a 100 kg weight from the floor. Weightlifter 2 also lifts a 100 kg weight to the same height above the floor, but takes a longer time to do so. Which of the following statements describes the work done and the power used by the weightlifters?

  1. Weightlifter 2 does the same work and uses less power compared with weightlifter 1.
  2. Weightlifter 2 does less work and uses the same power compared with weightlifter 1.
  3. Weightlifter 2 does the same work and uses more power compared with weightlifter 1.
  4. Weightlifter 2 does more work and uses the same power compared with weightlifter 1.
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29. Which of the following properties determines a color in the visible light region of the electromagnetic spectrum?
  1. acceleration
  2. amplitude
  3. frequency
  4. speed
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30. The source of a sound is moving away from an observer who is standing still. How do the sound waves received by the observer compare with those emitted by the source?
  1. They are heard as having a greater velocity.
  2. They are heard as having a higher frequency.
  3. They are heard as having a lower frequency.
  4. They are heard as having a smaller wavelength.
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