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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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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.

User Reid Barton
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2 Answers

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B you saayyyyyy? HMMMMMM CORRECT !!!

User Wcampbell
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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.

User Jatawn
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