While Standing at the Roadside Waiting for Your Ride You

question 15

Multiple Choice

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.

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