A student holds a tuning fork oscillating at 253 Hz. He walks toward a wall at a constant speed of 1.41 m/s. (a) What be

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answerhappygod
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A student holds a tuning fork oscillating at 253 Hz. He walks toward a wall at a constant speed of 1.41 m/s. (a) What be

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A student holds a tuning fork oscillating at 253 Hz.He walks toward a wall at a constant speedof 1.41 m/s.
(a) What beat frequency does he observe between the tuning forkand its echo?? Hz(b) How fast must he walk away from the wall to observe a beatfrequency of 4.50 Hz?? m/s
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