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Question
An ultrasonic wave is sent from a ship towards the bottom of the sea. It is found that the time interval between the transmission and reception of the wave is 1.6 seconds. What is the depth of the sea, if the velocity of sound in the seawater is 1400 ms–1?
Solution
Speed of sound = `" Distance travelled"/"Time taken"`
v = `(2"d")/"t"`
d = `("v""t")/2` = `(1400xx1.6)/2`
d = 1120 m
The depth of the sea is 1120 m.
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