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science

posted by on .

A bat flying in a cave emits a sound and
receives its echo 0.4 s later.
How far away is the cave wall? Assume the
speed of sound to be 340 m/s.
Answer in units of m.

  • science - ,

    Distance * 2 (for the return)
    = speed * time
    = 340 m/s * 0.4 s.
    Solve for distance.

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