Question

You are in a boat on lake ,you send down a sound wave to try to measure the depth in that spot of lake.The echo/pulse you sent returns 2 seconds later .calculate the depth of the lake assuming that speed of the sound in water is 1500ms

Answer 1

Explanation:

Velocity of sound in water v=1500 m/sLet the depth of sea be x.The sound has to travel to the bottom of the sea and get reflected back to the ship itself, thus total distance traveled by the sound is 2x.Time taken to hear an echo t=1 sSo, 2x=vtOr 2x=1500×1⟹ x=750 m