While standing at the roadside waiting for your ride you hear a frequency of 540 Hz from the siren of an approaching ambulance.After the ambulance passes,the observed frequency of the siren drops to 450 Hz.Take the speed of sound in air 340 m/s.The speed of the ambulance is
A)62 m/s.
B)51 m/s.
C)44 m/s.
D)31 m/s.
E)19 m/s.

Question

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The Answer of While standing at the roadside waiting for your ride you hear a frequency of 540 Hz from the siren of an approaching ambulance.After the ambulance passes,the observed frequency of the siren drops to 450 Hz.Take the speed of sound in air 340 m/s.The speed of the ambulance is
A)62 m/s.
B)51 m/s.
C)44 m/s.
D)31 m/s.
E)19 m/s.

While Standing at the Roadside Waiting for Your Ride You