Question

A SONAR transmits an ultra sonic sound signal towards the bottom of a sea. The time interval between the transmitting and the receiving of sound waves is 1.5 seconds. If the speed of ultrasonic sound in seawater is 1500 m/s, find the depth

of the sea.​

Answer 1

Explanation:

On sending an ultrasonic wave form a ship towards the bottom of a sea, the time interval between sending the wave and receiving it back is found to be 1.5 s.

Answer 2

Answer : 1125 m

SONAR (Sound oriented Navigation and Ranging)

SONAR (Sound oriented Navigation and Ranging)transmits an ultrasonic wave, which goes to the bottom of the sea and comes back after reflection from the ground.

SONAR (Sound oriented Navigation and Ranging)transmits an ultrasonic wave, which goes to the bottom of the sea and comes back after reflection from the ground.In this whole procedure, the waves travels the same distance twice.

Hence,

let the distance between surface and bottom of the sea be = x m

Therefore, total distance travelled by waves

Therefore, total distance travelled by waves = 2x m

Therefore, total distance travelled by waves = 2x mTime taken = 1.5 s

Therefore, total distance travelled by waves = 2x mTime taken = 1.5 sSpeed of waves underwater = 1500 m/s

$=> Total Distance = Speed × Time$

$= > 2x = 1500 \times 1.5$

$= > 2x = 2250 \\ = > x = \frac{2250}{2} \\ = > x = 1125 \: m$

Hence the depth of sea = 1125 m

Hope this helps :)