Question

Using Sonar sound pulses are emitted at the surface the pulses after being reflected from the bottom are detected if the time interval from the emission to the detection of the sound pulses is 2 second find the depth of the water take velocity of sound through water velocity is equal to 1500 M per second

Answer 1

t=2seconds
s=1500m/s
d=???(to be calculated)

d=s*t
d=1500*2/2
d=1500*1=1500

Answer 2

Here, the time 't' is given 2 sec.

And the velocity 'v' given is 1500 m/s.

But the time taken to reach the surface will be t/2 or 2/2 or 1 sec.

We know that:

v = λ/t

or, 1500 = λ/1

or, λ = 1500 m.

Hence, the depth of the water/ displacement from surface is 1500 m.