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October 23, 2014

Homework Help: physics

Posted by PLEASE HELP!! on Thursday, February 3, 2011 at 8:58pm.

While blowing its horn of frequency 477 Hz, a car accelerates at 0.94 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.

*Im getting an answer of about 20, but i dont want to submit my homework yet, can someone please check it over to see if i am correct?*

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