An Electrical Signal Is Delivered to a Transducer That Changes

An electrical signal is delivered to a transducer that changes the signal into a thump on a rock. As the wave travels through the rock, an electric sensor records the signal's travel time. What does this experiment help scientists to calculate?

A) the force of a wave
B) the magnitude of a wave
C) the effect of a medium on wave travel
D) the velocity of a wave

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