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09/01/2021 10:53 am
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A submarine emits a sonar pulse, which returns from an underwater cliff in 1.02 s. If the speed of sound in salt water is 1531 m s-1, how far away is the cliff?
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09/01/2021 10:55 am
Speed of sound in salt water = 1531 m s-1 Time taken by sonar pulse to return = 1.02 sec Distance travelled 2 × d = speed × time
2 x d = 1531 x 1.02
∴ \( d = \frac{1531 \times 1.02}{2}\)
d = 781 m