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I am trying to correct my mistakes from my physics exam. Please help me for provide detail explanattions and correct answer

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Answer #1

L = lambda/4=====> wavelength = 4L = 1.2 m

fo = V/wavelength = 343/1.2 = 285.833 hz


fo = V/4L = (343)/(4*0.3) = 285.833 Hz

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