Question

) If the man has been standing at a distance of 17m from the cliff, would he have hav
da clear echo?​

Answer 1

Explanation:

Time taken is given by : T=2d/V=2×12/340=24/340<0.1 seconds, so the man will not be able to hear the echo. This is because the sensation of sound persists in our ears for about 0.1 second after the exciting stimulus ceases to act.