You stand by the railroad tracks as a train passes by.You hear a 1 000-Hz frequency when the train approaches,which changes to 800 Hz as it goes away.How fast is the train moving? The speed of sound in air is 340 m/s.
A)15.7 m/s
B)21.2 m/s
C)28.0 m/s
D)37.8 m/s

Question

Quizplus · Accepted Answer

The Answer of You stand by the railroad tracks as a train passes by.You hear a 1 000-Hz frequency when the train approaches,which changes to 800 Hz as it goes away.How fast is the train moving? The speed of sound in air is 340 m/s.
A)15.7 m/s
B)21.2 m/s
C)28.0 m/s
D)37.8 m/s

You Stand by the Railroad Tracks as a Train Passes