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September 21, 2014

September 21, 2014

Posted by **sophie** on Saturday, April 4, 2009 at 8:00pm.

A. 42.2 Hz

B. 54.5 Hz

C. 61.8 Hz

D. 65.4 Hz

I used the Dopler effect formula and got B?

- Physics!! -
**drwls**, Saturday, April 4, 2009 at 8:13pmThe shift in frequency is, for slow speeds compared to the speed of sound, f*(V/a) = 583*(16/343) = 27.2 Hz , up or down. a is the speed of sound

Double that for the difference between the upshifted and the downshifted frequencies and you get 54.4 Hz

The correct answer is B. Good work.

The exact equation, which I am too lazy to look up, would probably give you 54.5 Hz

- Physics!! -
**sophie**, Saturday, April 4, 2009 at 8:19pmthanks!

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