Sound WavesHard

Question

A person observes a change of 2.5% in frequency of sound of horn of a car. If the car is approaching forward the person & sound velocity is 320 m/s, then velocity of car in m/s will be approximately : -

Options

A.8
B.800
C.7
D.6

Solution

ᐃf = fapp - fo = fo - fo

⇒ ⇒ vs = = 8m /s

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