Question

Pick out the wrong statement. Single choice.

(1 Point)

Reflected sound is called echo .

Echo is heard when original sound and reflected sound are heard at a time gap of minimum one tenth of a second .

The minimum distance between the source of sound and the reflecting surface must be 17.15 metre

The minimum distance between the reflecting surface and the source must be 34.8 3 metres



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Answer 1

Answer:

option C the minimum distance 17.15 metre

Answer 2

Answer:

option c) is correct..

here is your answer hope it will help you