Question: A train at rest emits a sound at a frequency of 9 4 9 Hz . An observer in a car travels away from the

A train at rest emits a sound at a frequency of 949 Hz. An observer in a car travels away from the sound source at a speed of 37.7 m/s. What is the frequency heard by the observer? Assume the speed of sound in air to be 342 m/s. Answer in units of Hz.

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