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A railroad train is traveling at 30.0 m/s in still air. The frequency of the note emitted by the train whistle is262 Hz. The speed of sound is 344 m/s.

A: What frequency is heard by a passenger on a train moving in the opposite direction to the first at 18.0 m/s and approaching the first?

B: What frequency is heard by a passenger on a train moving in the opposite direction to the first at 18.0 m/s and receding from the first?

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