Question

10. Calculate the minimum distance in the air required between the source of sound and
the obstacle to hear an echo. Take the speed of sound in air 343 m/s.
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Answer 1

Answer:

So the minimum distance required to hear an echo in air is achieved by: d=343*0.05 or, d=17.15 Therefore to hear echo in air at room temperature, the minimum distance is 17.15m

Explanation:

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