Question

A SONAR uses ultrasonic waves
to detect
and locate objects under water. In a
submarine
equipped with a sonar
sends out ultrasound that
returns exactly after 77 sec
•Consider the speed
of ultrasonic /ultrasound in water to be 1450m/s.
Calculate the distance blu submarine and enemy
submarine.​

Answer 1

Answer:

ANSWER

Let the distance between the ship and the enemy submarine beS.

Speed of sound in water =1450m/s

Time lag between transmission and reception of Sonar waves =77s

In this time lag, sound waves travel a distance which is twice the distance between the ship and the submarine (2S).

Time taken for the sound to reach the submarine =

2

1

×77=38.5s

Distance between the ship and the submarine, S=1450×38.5=55825m=55.8km

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