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With what speed (as a function of the speed of sound, v) must the source must move away from a stationary observer for the observer to hear the sound with the desired reduced frequency?

With what speed (as a function of the speed of sound, v) must the source must move away from a stationary observer for the observer to hear the sound with the desired reduced frequency?

College Physics
College Physics
11th Edition
ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
Publisher:Raymond A. Serway, Chris Vuille
Chapter1: Units, Trigonometry. And Vectors
Section: Chapter Questions
Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...
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My answer is incorrect, please write your explanation(process detail) why the answer is v(p)/(1-p) and write why my answer is wrong.

I attach the image and write my process of explanation.

My solution:

When the source is moving away with a speed of vs.

Using Doppler's effect for this case,

f=fo(v/v+vs)

Then the speed f source will be

vs=(fo/f)-1v

putting the values

vs=(fo/pfo)-1v=1p-1v

Hence, the speed of the source (moving away) is vs=1p-1v.

Professor's solution and answer I attach in the image. Don't copy other answer.

With what speed (as a function of the speed of sound, v) must the source must move away from a stationary observer for the observer to hear the sound with the desired reduced frequency? Using doppler's esbect The speed of Sourne Vs= Putting the milve of. -1)V= (5-1)V Pdo b) v, = _(P - 1 ) v b) vz = %3D
Transcribed Image Text:With what speed (as a function of the speed of sound, v) must the source must move away from a stationary observer for the observer to hear the sound with the desired reduced frequency? Using doppler's esbect The speed of Sourne Vs= Putting the milve of. -1)V= (5-1)V Pdo b) v, = _(P - 1 ) v b) vz = %3D
source moving aw ay: f, = f, () f, = (1-P) fs |-p=
Transcribed Image Text:source moving aw ay: f, = f, () f, = (1-P) fs |-p=
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