3. An observer is standing next to the tracks, watching a train approach. The train travels at 30 m/s and blows its whistle at 8,000 Hz as it approache
by the observer without slowing down. Assuming the speed of sound is 340 m/s, how much of a frequency change did the observer hear?
A. 1,412 Hz
B. 1,423 Hz
C. 1,485 Hz
D. 1,551 Hz
Answers: 2
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3. An observer is standing next to the tracks, watching a train approach. The train travels at 30 m/...
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