Practice Quiz

MCAS Physics Exam Practice - Question List

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141. Which of the following changes occurs as a solid is heated?
  1. The kinetic energy of the solid decreases.
  2. The average density of the solid increases.
  3. The specific heat capacity of the solid decreases.
  4. The average molecular speed in the solid increases.
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142. Which of the following describes the mechanical energy of a cart at rest at the top of a steep hill?
  1. The cart has no mechanical energy.
  2. The cart’s mechanical energy is all kinetic.
  3. The cart’s mechanical energy is all potential.
  4. The cart’s mechanical energy is half potential and half kinetic.
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143. What is the frequency of ocean waves that have a speed of 18 m/s and a wavelength of 50 m?
  1. 0.18 Hz
  2. 0.36 Hz
  3. 2.8 Hz
  4. 9.0 Hz
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144. Which of the following must be included with magnitude to represent a vector?
  1. mass
  2. direction
  3. acceleration
  4. volume
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145. Some campers are sitting around a campfire outside their tent. Which product of the fire is in the form of electromagnetic waves?
  1. light
  2. smoke
  3. sound
  4. water vapor
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