A police car sounding a siren with a frequency of 1.580 [kHz] is traveling at 120.0 [km/hr ]. Consider the speed of sound ?????? = 340 [m/s]. (a) What frequencies does an observer standing next to the road hear as the car approaches and as it recedes? (b) What frequencies are heard in a car traveling at 90.0 [km/hr ] in the opposite direction before and after passing the police car?
Interference of sound
Seiche
A seiche is an oscillating standing wave in a body of water. The term seiche pronounced saysh) can be understood by the sloshing of water back and forth in a swimming pool. The same phenomenon happens on a much larger scale in vast bodies of water including bays and lakes. A seizure can happen in any enclosed or semi-enclosed body of water.
A police car sounding a siren with a frequency of 1.580 [kHz] is
traveling at 120.0 [km/hr ]. Consider the speed of sound ?????? = 340 [m/s].
(a) What frequencies does an observer standing next to the road hear as the car
approaches and as it recedes?
(b) What frequencies are heard in a car traveling at 90.0 [km/hr ] in the opposite direction
before and after passing the police car?
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