Questions
A motor car blowing a horn of frequency 124 vib/sec moves with a velocity 72 km/hr towards a tall wall. The frequency of the reflected sound heard by the driver will be (velocity of sound in air is 330 m/s)
detailed solution
Correct option is C
Similar to previous question The frequency of reflected sound heard by the driver n'=n v−(−v0)v−vs=n v+v0v−vs=124 330+(72×5/18)330−(72×5/18)=140 vibration/secSimilar Questions
An observer is moving towards the stationary source of sound, then
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