Question

In a sonar, ultrasonic waves are sent into the sea water and the reflected waves from a sunken ship are received after $2.0s$. If the velocity of waves in sea water is $1450ms-1$, find the depth of sunken ship.

• A. $2900m$
• B. $1450m$
• C. $2800m$
• D. $3000m$

Answer 1

The correct option is B

$1450m$

Given,
velocity of wave $v=1450m{s}^{-1}$
time after reflected waves are recieved $t=2.0s$

depth of sunken ship (d):
$d=\frac{v\times t}{2}$
$d=1450\times \frac{2}{2}$
$d=1450m$