Physics
meganpottorff
5

The change in pitch of a train's horn as it passes while you are standing still can be explained by A. resonance. B. the Doppler effect. C. sympathetic vibration. D. ultrasonic vibrations.

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(1) Answers
Llama11

B. the Doppler effect. The Doppler effect is a phenomenon whereby the frequency from a moving object towards an observer appears to increase while the frequency appears to decrease as it moves away from the observer.

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