Question

what should be the minimum distance of the obstacle to hear an echo by a person whose persistence of hearing is 0.2 seconds?​

Answer 1

Answer:

jo dj do to ur zi di if do put to it go go ug go

Answer 2

Answer:

to hear a clear echo, the minimum distance between the reflecting surface and the observer is 17 m.

Explanation:

Echo is a distortion of the sound that comes to the listener with a pause following the direct tone.