A person fires a gun standing at a distance of 55 m from a wall. If the speed of sound is 330 ms-1, find the time for an echo to be heard.
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Answer:
Time = Distance travelled/speed
Total distance = 55+55
=110 m
because for an echo to be heard, the sound will go to the wall and then return.
t = d/s
= 110/330
= 1/3 = 0.33 s
Explanation:
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