Q. 174.4( 60 Votes )
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.
Time taken = 5 seconds
The time taken by ultrasound signal to travel from the submarine to the object will be half of this time:
= 2.5 seconds
We know that,
= 1450 m/s
Therefore, the speed of sound is 1450 m/s.
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