The Doppler shift was first tested in 1845by the French scientist B. Ballot. He hada trumpet player...

Question

The Doppler shift was first tested in 1845
by the French scientist B. Ballot. He had
a trumpet player sound a 414 Hz note while
riding on a flat-car pulled by a locomotive. At
the same time, a stationary trumpeter played
the same note. Ballot heard 4 beats/s.
How fast was the train moving toward him?
The s...

Robert · Accepted Answer

Consider the given data, 
Frequency of sound by trumpet player, Tf 414Hz  
Frequency of sound by stationary trumpeter, STf 4beats / sec  
Speed of sound in air, av 343m / sec  
Assume, speed of train is Tv  and speed of the car with respect to train cv 0 .

The Doppler shift was first tested in 1845 by the French scientist B. Ballot. He had a trumpet player sound a 414 Hz note while riding on a flat-car pulled by a locomotive. At the same time, a...

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