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A train whistle is at a higher pitch (note) as it approaches you and then drops to a lower pitch as it moves away. This effect is called A) the Eiffel effect. B) the Doppler effect. C) the genesis effect.
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A train whistle is at a higher pitch (note) as it approaches you and then drops to a lower pitch as it moves away. This effect is called A) the Eiffel effect. B) the Doppler effect. C) the genesis effect. D) the electromagnetic spectrum.

User Abhinav Suman
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Answer:

The Doppler effect

Step-by-step explanation:

User Jon Nadal
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