A physics student sits by the open window on a train moving at 20.0 m/sec toward

Question

A physics student sits by the open window on a train moving at 20.0 m/sec towards the east. Her boyfriend is standing on the station platform, sadly watching her leave. When the train is 107.0 meters form the station, it emits a whistle at a frequency of 3000.0 Hz. 1) What frequency does the boyfriend hear ? f = Hz 2) What frequency does the physics student hear? f = Hz 3) A chemistry student (with nothing better to do than ride around on trains all day) is on a west bound train moving at a velocity of 15.0 m/sec towards the station. Before the two trains pass each other, what frequency will he hear from the train whistle from the physics student's train? f = Hz 4) What frequency will the chemistry student hear after his train passes the physics student's train? f =

Explanation / Answer

part d) use the same equation that was used for part c except switch the signs. (1-(15/343))/(1+(20/343))3000 = 2710.74

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