Question

A scientist uses a variable frequency microphone/speaker system (sonar) to measure the depth of water. In freshwater (were sound travels at 1490 m/s) and 120 Hz sound is sent from a stationary ship to the bottom of a deep lake and the time interval between the generation and detection of the echo takes 1.14 seconds.
What is the distance from the ship to the bottom of the lake?

Answer 1

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