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The whistle on a train produces a sound wave with a particular pitch. Which of the following best describes the whistle sound that a person perceives while the train approaches him or her?

A. A higher pitch, then a lower pitch

B. The same pitch

C. A higher pitch

D. A lower pitch

User Alwinlin
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1 Answer

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A. A higher pitch, then a lower pitch
User Cyberbikepunk
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