(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

a train moves with uniform velocity . its horn is with a definite frequency . then if the frequency that a man in the station had heard is changed from 5400 Hz to 4500 Hz . calculate :-

1- velocity of train.

2- the real frequency of the source .

let the velocity of sound in air = 330 m/s .

2. Relevant equations

3. The attempt at a solution

f'/f = v/(v+vs)

vs = velocity of train = 63 m/s .

is that solution is true ?

and i can't solve or understand the second item of my problem .

please i want a help .

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# Homework Help: Problem about Doppler effect

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