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1. The problem statement, all variables and given/known data

A student in a parked car honks the horn, which has a `proper' frequency of 310.00 Hz. An observer in an approaching vehicle measures the frequency of the sound to be 342 Hz. Calculate the speed of the approaching vehicle. Use 340 m/s as the speed of sound in air.

2. Relevant equations

Fo / V + Vo = Fs / V + Vs

Fs = 310 Hz

Vs = 0 m/s

Fo = 342 Hz

Vo = ?

V = 340 m/s

3. The attempt at a solution

Vo = (Fs / V + Vs) * (V / Fo)

I know this is where I am messing up because I am not getting the right answer. Can someone show me where I am going wrong.

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# Homework Help: Doppler Effect Ahhhh!

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