In one of the original Doppler experiments, a tuba was playedon a moving flat train car at a frequency of 75 Hz., and a secondidentical tuba played the same tone while at rest in the railwaystation. What beat frequency was heard if the train car approachedthe station at a speed of 10.0 m/s?

opatovaL

opatovaL

Answered question

2021-03-11

In one of the original Doppler experiments, a tuba was playedon a moving flat train car at a frequency of 75 Hz., and a secondidentical tuba played the same tone while at rest in the railwaystation. What beat frequency was heard if the train car approachedthe station at a speed of 10.0 m/s?

Answer & Explanation

gotovub

gotovub

Skilled2021-03-13Added 98 answers

Beat freq is the difference between the two observedfrequencies. The sound heard from the stationary tuba is 75 Hz.From the moving tuba?
fobs=fsource(vvvsource)=75(34334310)=77.25Hz
So the beat freq was:77.25 - 75 = 2.25 Hz

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