Distance between two submarines, s=3060m
Time taken by signal to go from sonar to another submarine, t=42s=2s
∴ velocity of sound in water =st=30602ms−1=1530ms−1
A sonar device on a submarine sends out a signal and receives an echo 5 s later. Calculate the speed of sound in water if the distance of the object from the submarine is 3625 m.
A SONAR system fixed in a submarine operates at a frequency 40.0
kHz. An enemy submarine moves towards the SONAR with a speed of 360
km h–1. What is the frequency of sound reflected by
the submarine? Take the speed of sound in water to be 1450 m s–1.