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  • B)

    It decreases by a factor of 8.

  • C)

    It decreases by a factor of 16.

  • D)

    It remains the same.

Answer: C

  • 18)

    An object that completes 100 vibrations in 5 seconds has a period of

    • A)

      0.5 second.

    • B)

      1 second.

    • C)

      2 seconds.

    • D)

      None of the above choices are correct.

Answer:D

19) A weight suspended from a spring bobs up and down over a distance of 1 meter in two seconds. Its frequency is

  • A)

    0.5 hertz.

  • B)

    1 hertz.

  • C)

    2 hertz.

  • D)

    None of the above choices are correct.

Answer: A

  • 20)

    When a block of ice at zero degrees Celsius melts, the ice

    • A)

      absorbs energy from its environment.

    • B)

      releases energy to its environment.

    • C)

      absorbs energy and gets warmer.

    • D)

      releases energy and gets warmer.

    • E)

      absorbs energy but does not change its temperature.

Answer: E

  • 21)

    A good reflector of radiation is

    • A)

      good absorber of radiation.

    • B)

      good emitter of radiation.

    • C)

      poor absorber of radiation.

    • D)

      none of these

Answer: C

  • 22)

    Ice cubes submerged at the bottom of a liquid indicate that the liquid

    • A)

      produces no buoyant force on the ice.

    • B)

      has dissolved air.

    • C)

      is warmer than the ice.

    • D)

      is not displaced by the submerged ice.

    • E)

      is less dense than ice.

Answer: E

23) Two equal sized buckets are filled to the top with water. One of the buckets has a piece of wood floating in it, making its total weight A) less than the weight of the other bucket.

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