Question

A submarine emits a sonar pulse which returns from an underwater cliff in 1.02 second if the speed of the sound in salt water is 1531 metre per second how far away is the cliff

Answer 1

Answer:

78.081m

Explanation:

here's the answer

Answer 2

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Time taken by the sonar pulse to return, t = 1.02 s

Speed of sound in salt water, v = 1531 m s−1

Distance of the cliff from the submarine = Speed of sound × Time taken

Distance of the cliff from the submarine = 1.02 x 1531 = 1561.62m

Distance travelled by the sonar pulse during its transmission and reception in water = 2 × Actual distance = 2d

Actual Distance , d = (Distance of the cliff from the submarine)/2 = 1561.62/2 = 780.31 m

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