Train Air Horn
Dec 03
2010
2010
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While standing near a railroad crossing, you hear a train horn. The frequency emitted by the horn is 420 Hz.?
While standing near a railroad crossing, you hear a train horn. The frequency emitted by the horn is 420 Hz. Assume the train is traveling at 89.0 km/h and the air temperature is 20°C.
a) (a) What is the frequency you hear when the train is approaching?
_____Hz?
b) What is the frequency you hear after it has passed?
_______Hz?
Its a Doppler Effect question!!!
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