Question

1. An echo is heard in 3 s. What is
the distance of the reflecting
surface from the source, given
that the speed of sound is
342 m s-1?​

Answer 1

Explanation:

Speed of sound, v = 342 m sˆ’1

Echo returns in time, t = 3 s

Distance travelled by sound = v — t = 342 — 3 = 1026 m

In the given time interval, sound has to travel a distance that is twice the distance of the reflecting surface and the source.

Hence, the distance of the reflecting surface from the source=1026/2m = 513 m.

Answer 2

Answer:

What is the distance of the reflecting surface from the source, given that the speed of sound is 342 m/s? In the given interval of time, sound must travel a distance that is twice the distance of the reflecting surface and source. Therefore, the distance of the reflecting surface from the source =1026/2 = 513 m.

Explanation:

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