Question

An echo sounder in a ship is produces a sound pulse and an echo is received from the sea bed after 0.2sec . If the velocity of sound in water is 1400m/s , calculate the depth of the sea

Answer 1

echo is heard after 0.2 second

so time taken by the sound to reach the sea bed =0.2/2=0.1 second

velocity of sound under water is 1400m/s

so depth=1400m/s*0.1 s=140m