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physics

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While blowing its horn of frequency 466 Hz, a car accelerates at 0.84 m/s2.

The car starts from rest by your side and moves away.

How many seconds does it take for the frequency you hear to decrease by 5%?

Hint: Do not forget to include the time it will take for sound to reach you

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    The car starts from rest by your side and moves away.

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