Question

a submarine emits the sonar pulse which returns from an underground cliff in 1.s. if that if the speed of the sound in salt water is 1500 m s how far away is the Cliff?​

Answer 1

Time taken by the sonar pulse to return, t = 1 s

Speed of sound in salt water, v = 1500 ms-1

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

Distance of the cliff from the submarine = 1 x 1500 = 1500m

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

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

                                = 1500/2

                                = 750m