A ship that is stationary on the surface of the sea sends pulses of sound vertically downwards towards the sea bed. Each pulse that reflects from the sea bed is received 1.0 s after it is sent out. A whale swims under the boat and a pulse is received 0.60 s after it is sent out. The speed of sound in sea water is 1500 m/s. What is the distance of the whale above the sea bed? D) 750 m C) 600 m A) 300 m B) 450 m
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