1.

A train moving with a velocity 30ms^(-1) blows a whistle of frequency 516 Hz. Find the pitch of the sound heard by a passenger in another train approaching the first at a speed of15ms^(-1), velocity of sound = 330ms^(-1).

Answer»

SOLUTION :It both the trains are approaching each other.
The apparent frequency `N.=((v+v_(0))/(v-v_(s)))n`
`n.=((330+15)/(330-30))xx516`
`n.=(345)/(300)xx516=1.15xx516`
`n.=593.4Hz`


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