The figure below shows wave fronts of sound waves from the siren of a police car. Two people on both side of the car are running at 5 m/s to the left. The frequency of the siren is 400 Hz. The person on the left observes a frequency of 388.7 Hz. Speed of sound in air is 340 m/s. a) How fast is the policy car travelling? b) What is the frequency observed by the person on the right? c) What is the wavelength observed by the person on the righ?
The figure below shows wave fronts of sound waves from the siren of a police car. Two people on both side of the car are running at 5 m/s to the left. The frequency of the siren is 400 Hz. The person on the left observes a frequency of 388.7 Hz. Speed of sound in air is 340 m/s. a) How fast is the policy car travelling? b) What is the frequency observed by the person on the right? c) What is the wavelength observed by the person on the righ?
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Transcribed Image Text:The figure below shows wave fronts of sound waves from the
siren of a police car. Two people on both side of the car are
running at 5 m/s to the left. The frequency of the siren is 400
Hz. The person on the left observes a frequency of 388.7 Hz.
Speed of sound in air is 340 m/s.
a) How fast is the policy car travelling?
b) What is the frequency observed by the person on the
right?
c) What is the wavelength observed by the person on the
righ?
R
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