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24 April, 19:34

A sound wave traveling downward with a speed of about 4000 m per 2nd suddenly slows to 1500 m per 2nd not far below the Earth's surface what has the sound wave most likely encountered

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Answers (2)
  1. 24 April, 19:54
    0
    Answer: the waves probably hits an open cavity

    Explanation:

    Sound waves transfers energy in form of vibration through water, the speed of sound is greatest in solids followed by liquids and gases, for we to observe such a reduction from 4000m/s to 1500m/s that means it sound had been transmitted through air like open cavity seen in intrusive rock beneath the earth.
  2. 24 April, 19:56
    0
    Options:

    a) A different kind of rock

    b) An underground lake

    c) An open cavity

    d) A pile of dinosaur bones

    Answer:

    Option B. An underground lake

    Explanation:

    The speed of sound in water ranges from 1450 m/s to 1500 m/s. The speed of the sound wave changes because it has crosses two media of different densities. This wave is bound to have a change in direction because of change in the density and speed of the media it passes.

    The 1500 m/s speed in the second medium shows that the medium is a pool of water. The only option that applies is an underground lake
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