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10th -



Sound 2


17 questions

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  • 1. Multiple Choice
    2 minutes
    1 pt

    A sound wave is different than a light wave in that a sound wave is:

    A. Produced by an oscillating object and a light wave is not.

    B. Not capable of traveling through a vacuum.

    C. Not capable of diffracting and a light wave is.

    D. Capable of existing with a variety of frequencies and a light wave has a single frequency.

  • 2. Multiple Choice
    2 minutes
    1 pt

    A sound wave is a pressure wave; regions of high (compressions) and low pressure (rarefactions) are established as the result of the vibrations of the sound source. These compressions and rarefactions result because sound

    A. Is denser than air and thus has more inertia, causing the bunching up of sound.

    B. Waves have a speed that is dependent only upon the properties of the medium.

    C. Is like all waves; it is able to bend into the regions of space behind obstacles.

    D. Is able to reflect off fixed ends and interfere with incident waves

    E. Vibrates longitudinally; the longitudinal movement of air produces pressure fluctuations.

  • 3. Multiple Choice
    2 minutes
    1 pt

    In the storming night, you will always see the lightning first, then hear the thunder after. When the lightning is 5 seconds ahead of the thunder, how far the cloud is way from you? (The speed of light is 3.0×108 m/s, the speed of sound is 343 m/s)

    500 m

    1000 m

    1700 m

    2000 m

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