a submarine emits a sonar pulse which returns from an underwater cliff in 1.02.s . if the speed of sound in salt water is 1531 m/s, how far away is the cliff?
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Answer:
The time in which submarines emit sonar pulses
= 1.02s
speed of sound in water = 1531m/s
distance which sonar pulses cover = time × speed
= 1.02s× 1531m/s
= 1561.62m
the distance from the submarine to cliffs
= distance which sonar pulses cover ÷2
= 1561.62m ÷2
= 780.81m
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