(See attached file for full problem description)
The Doppler Effect on a Train
A train is traveling at 30.0 in still air. The frequency of the note emitted by the train whistle is 262 .
What frequency is heard by a passenger on a train moving at a speed of 18.0 in the opposite direction with respect to the first train and receding from it?
Express your answer in hertz.
The solution explains the dopple effect with respect to a moving train.