Class 9 Science - Chapter Sound NCERT Solutions | A sonar device on a submarine sends out

Welcome to the NCERT Solutions for Class 9th Science - Chapter Sound. This page offers a step-by-step solution to the specific question from Excercise ".$ex_no." , Question 20: a sonar device on a submarine sends out a signal a....
Question 20

A sonar device on a submarine sends out a signal and receives an echo 5 s later. Calculate the speed of sound in water if the distance of the object from the submarine is 3625 m.

Answer

Time taken to hear the echo, t = 5 s

Distance of the object from the submarine, d = 3625 m

Total distance travelled by the sonar waves during the transmission and reception in water = 2d

Velocity of sound in water,

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