Answered

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A fire engine is rapidly moving away from you from a stop light. What happens to the frequency and pitch of the sound as the fire engine gets farther away?

a. The frequency increases, and the pitch increases.
b.The frequency increases, and the pitch decreases.
c.The frequency decreases, and the pitch decreases.
d.The frequency decreases, and the pitch increases.

Sagot :

Answer: A

Explanation:

A high frequency corresponds to a high pitch. So while the siren produces waves of constant frequency, as it approaches us the observed frequency increases and our ear hears a higher pitch. After it has passed us and is moving away, the observed frequency and pitch drop

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