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April 1, 2015

April 1, 2015

Posted by **Andrea** on Friday, February 29, 2008 at 11:40am.

I know that I would use f'=f (v - v_o)/(v + v_s)

But what I don't get is the mach number .85

Isn't mach number .85 = v_s/v?

How would I set up this problem?

Should it look like this:

=(1500Hz) (1-0)/(340m/s+.85)

=4.4Hz

Is this correct?

- Physics -
**Dan**, Friday, February 29, 2008 at 6:46pmI'm not familiar with that particular term, but mach number .85 could possibly mean 0.85 times the speed of sound.

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