What beat frequency was heard

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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.

Reference no: EM13689891

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