Practice Quiz

MCAS Physics Exam Practice - Question List

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91. Which of the following is possible due to longitudinal waves?
  1. seeing the color red
  2. getting a tan at the beach
  3. hearing the sound of the ocean
  4. riding a wave on a surfboard
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92. A student hypothesizes that the mass of a substance affects how the temperature of the substance changes when it is heated. The student uses the following procedure to test the hypothesis.• Each sample is initially at room temperature before heating.• Each sample is heated for the same amount of time with the same heat source.• The final temperature is measured for each sample.Which of the following would be the best way to select the samples for testing the student’s hypothesis?
  1. Obtain samples of one substance, each with the same mass.
  2. Obtain samples of one substance, each with a different mass.
  3. Obtain samples of different substances, each with the
    same mass.
  4. Obtain samples of different substances, each with a different mass.
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93. A boat tied to a dock is stationary. Water waves constantly pass by the boat. The crests of the waves are 3 m apart and a crest passes the front of the boat every 4 s.What is the velocity of the waves?
  1. 0.75 m/s
  2. 1.33 m/s
  3. 3 m/s
  4. 12 m/s
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94. A window washer noticed that, from the same distance and with no breeze, the smell of ammonia glass cleaner reached him faster on a hot day (30°C) than on a cold day (5°C). Which of the following explains this observation?
  1. Molecules expand at higher temperatures.
  2. Molecules move more rapidly at higher temperatures.
  3. The convection currents carry molecules at higher temperatures.
  4. The chemical reaction of molecules increases at higher temperatures.
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95. A student standing on the edge of a swimming pool sees a painted mark on the bottom of the pool. The mark appears to be at a shallower depth than the actual depth of the pool.Which of the following descriptions of light waves best explains this observation?
  1. Light from the mark travels through the water in a curved path.
  2. Light from the mark is refracted as it travels from the water to the air.
  3. Light from the mark is reflected as it travels from the water to the air.
  4. Light from the mark bounces off the boundary between the water and the air.
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