Practice Quiz

MCAS Physics Exam Practice - Question List

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71. A sound wave can be transmitted through all of the following except
  1. a gas.
  2. a liquid.
  3. a solid.
  4. a vacuum.
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72. Three different boxes are lifted to different heights.• Box X weighs 115 N and is lifted to 15 m.• Box Y weighs 210 N and is lifted to 10 m.• Box Z weighs 305 N and is lifted to 5 m.Which of the following statements best describes the boxes’ change in mechanical energy?
  1. Box X had the greatest change in mechanical energy.
  2. Box Z had the smallest change in mechanical energy.
  3. Boxes X and Y had the same change in mechanical energy.
  4. Boxes Y and Z had the same change in mechanical energy.
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73. Which of the following statements applies to a longitudinal wave?
  1. The motion of the medium is random.
  2. The motion of the medium is in a circular pattern.
  3. The motion of the medium is parallel to the motion of the wave.
  4. The motion of the medium is perpendicular to the motion of the wave.
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74. A magnetic compass is placed near an insulated copper wire. When the wire is connected to a battery, the compass needle changes position.Which of the following is the bestexplanation for the movement of the needle?
  1. The copper wire magnetizes the needle to create a force.
  2. The needle magnetizes the copper wire to create a force.
  3. The current in the wire produces a magnetic field and exerts a force on the needle.
  4. The insulation on the wire becomes energized and exerts a force on the needle.
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75. Mike, who has a mass of 75 kg, is running north at 2.6 m/s. He accidentally collides with Tom, who has a mass of 125 kg and is not moving.Which of the following statements describes how much momentum each person has before the collision?
  1. Mike has a momentum of 130 kg • m/s north, and Tom has no momentum.
  2. Mike has a momentum of 195 kg • m/s north, and Tom has no momentum.
  3. Both Mike and Tom have a momentum of 130 kg • m/s north.
  4. Both Mike and Tom have a momentum of 195 kg • m/s north.
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