A speaker fixed to a moving platform moves toward a wall, Ask an Expert

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A speaker fixed to a moving platform moves toward a wall, emitting a steady sound with a frequency of 240 Hertz. A person on the platform right next to the speaker detects the sound waves reflected off the wall and those emitted by the speaker.

Determine how fast should the platform move for the person to detect a beat frequency of 2.0 Hertz? Take the speed of sound to be 344 m/s.

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Category:- Physics
Reference No.:- M91221645

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