Question

Ultrasonic waves are
transmitted downwards into the sea with
the help of a SONAR. The reflected sound
is received after 4 s. What is the depth of
the sea at that place?
(Velocity of sound in seawater = 1550 m/s)​

Answer 1

Answer:

Given:

Velocity of sound in water =1550m/s

time for echo to be heard =4s

Time taken by sound waves to reach the bottom of the sea =4/2=2 s

$velocity = \frac{distance}{time} \\ distance = velocity \times time \\ \: \: \: \: = 1550 \times 2 = 3100m \: \\ depth \: of \: the \: sea \: at \: that \: place \: = 3100m \:$

Answer 2

Answer:

Velocity of sound in water =1550m/s

time for echo to be heard =4s

Time taken by sound waves to reach the bottom of the sea =4/2=2 s

Velocity = distance/time

distance = velocity × time

= 1550 × 2

= 3100 m