A train is traveling at 30.0 m/s relative to the ground in still air. The freque

Question

A train is traveling at 30.0 m/s relative to the ground in still air. The frequency of the note emitted by the train whistle is 262 Hz. The speed of sound in air should be taken as 344 m/s. First calculate the frequency as heard by a passenger traveling on another train in the opposite direction towards the first train at a speed of 18 m/s relative to the ground. Then calculate the frequency as heard by a passenger on the second train after passing the first train as it then moves away from it at a speed of 18 m/s relative to the ground.

Explanation / Answer

A. 302

B. 228

source: MasteringPhysics

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