Answers to Physics Module Questions - Module 19

  1. The pitch (frequency) of a car's horn ___ as the car drives past you.
    1. rises
    2. drops
    3. stays the same
    4. all of the above
    5. none of the above

  2. The frequency of a pendulum on a high-gravity planet is ____ compared to the frequency on a low-gravity planet.
    1. higher
    2. lower
    3. the same
    4. all of the above
    5. none of the above

  3. A buoy rises and falls by a total height of 2 meters on the open ocean. What is the amplitude of the waves.
    1. 2 meters
    2. 4 meters
    3. 1 meter
    4. 0.5 meters
    5. 8 meters
    6. all of the above

  4. A star is moving towards our solar system. Based on the Doppler effect, the frequency of its light is shifted towards
    1. blue
    2. red
    3. white
    4. black
    5. all of the above

  5. For two waves to be in phase, a sufficient condition is that the waves have the same
    1. amplitude
    2. wavelength
    3. frequency
    4. speed
    5. instants in time at which the wave amplitude is zero

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