A band playing music at frequency f is moving towards a wall at a speed ofv_(b) . A motorist is following the band with a speed ofv_(m). If v is the velocity of sound , obtain an expression for the beat frequency heard by the motorist

A band playing music at frequency f is moving towards a wall at a spee

1.	A band playing music at frequency f is moving towards a wall at a speed ofv_(b) . A motorist is following the band with a speed ofv_(m). If v is the velocity of sound , obtain an expression for the beat frequency heard by the motorist
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