Physics, asked by kapoorgarima, 1 year ago

minimum distance of obstacle from source of sound to hear ECHO is

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Answered by vaibhavdhariwal

it is 17meters
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Answered by Anonymous

Hence, the total distance covered by the sound from the point of generation to the reflecting surface and back should be at least (344 m/s) ×0.1 s = 34.4 m. Thus, for hearing distinct echoes, the minimum distance of the obstacle from the source of sound must be half of this distance.
then =34.4/2= 17.2m

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