Sound waves are transmitted downwards into the sea at the depth of 3100 m with the help of SONAR technique. After what time an echo of sound will be heard?
(A) 2s (B) 1s (C) 4s (D) 8s
Answers
Answered by
3
Answer:
It will be heard after 2sec
Answered by
2
Answer:
C
Explanation:
Velocity of sound in sea =1550m/s
depth of sea=3100m
Time required to listen an echo=2×depth of the sea ÷ Velocity of sound in sea water
2×3100÷1550
=4seconds
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