Determine frequency of boat - sound waves, Physics

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Boat A is travelling at 4.6 m/s. Boat B is moving away from boat A at 9.2 m/s, as shown in the figure below.

The captain of boat B blows an air horn with a frequency of 550 Hz. What frequency does boat A hear?

Use 343 m/s for the speed of sound.

 

934_physics.png


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