The beat detected on a moving platform 8 of 8 Constants Part A A speaker fixed t

Question

The beat detected on a moving platform 8 of 8 Constants Part A A speaker fixed to a moving platform moves toward a wall, emitting a steady scund with a frequency of 225 Hz. A person on the platform right next to the speaker detects the sound waves refiected off the wall and those emitted by the speaker How fast should the platform move, "p for the person to detect a beat frequency of 6.00 Hz? Take the speed of sound to be 344 m/s Express your answer numerically in meters per second using three significant figures View Available Hint(s) m/s Submit

Explanation / Answer

v = 344 m/s

using the given values

fw = 225 + ( 6/2 )

fw = 228 Hz

V = ( fw / fo ) X v

V = ( 228 / 225 ) X 344

V = 348.586 m/s

speed of the platform is Vp = 348.586 - 344

Vp = 4.586 m/s

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