Here is the problem which I am struggling on, please help me!
Problem: In one of the original Doppler experiments, a tuba was played on a moving flat train car at a frequency of 62Hz, and a second identical tuba played the same tone while at rest in the railway station.
1- What beat frequency was heard if the train car approached the station at a speed of 6.30m/s?
Show all work, use additional paper if necessary.