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Question
A sonar station picks up a return signal after 3 seconds. How far away is the object ? (Speed of sound in water = 1440 m/s).
Solution
We have to calculate the depth using a sonar signal.
Given: Time taken to listen to the return signal t = 3 s
So time taken to reach the depth `(t_D) = 3/2` s
Speed of sound in water ν = 1,440 m/s
So the depth can be calculated as
= ν × tD
= 1440 × 1.5 m
= 2160 m
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