Physicsmedium · Past Paper
A SONAR device on a ship sends a signal to the ocean floor and receives an echo 4 seconds later. If the speed of sound in water is 1500 m/s, what is the depth of the ocean?
A6000 m
B3000 m
C1500 m
D750 m
✓ Correct Answer: B — 3000 m
Depth = (Speed * Time) / 2 = (1500 * 4) / 2 = 3000 meters.
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