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An ambulance is traveling east at 51.6 m/s. Behind it there is a car traveling along the same direction at 32.3 m/s. The ambulance driver hears his siren at a frequency of 615 Hz.
32.3 m/s Car
51.6 m/s Ambulance

What is the wavelength of the sound of the ambulance’s siren if you are standing at the position of the car? The velocity of sound in air is 343 m/s .
Answer in units of m



Answer :

speed of source=51.6=s
speed of observer=32.3=o
original frequency=615=F
speed of sound=343=S
frequency hear by observer=f
f={ (S+o) /(S+51.6) }/F
f=585
Wavelength=5x 10^{5}  m

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