Question: Two train whistles have identical frequencies of 180 Hz. When one train is at rest in the station and the other is moving nearby, a

Two train whistles have identical frequencies of 180 Hz. When one train is at rest in the station and the other is moving nearby, a commuter standing on the station platform hears beats with a frequency of 2.00 beats/s when the whistles sound at the same time. What are the two possible speeds and directions that the moving train can have?

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