MHT CET Physics question
A motor car blowing a horn of frequency 124 vib/s 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) [MP PET 1997, Similar KCET 2007, IIT JEE 2011]
Answer: (C)
Solution
With m/s, vib/s; 109 vib/s is below the source frequency
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