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Second and third resonating length of re...

Second and third resonating length of resonace tube experiment were observed to be 54 cm and 89 cm when vibrated with a tuning fork of frequency 480 Hz. Find
first resonating length

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Also` I_(2) - I_(2) = ((3lambda)/(4) +e) - ((lambda)/(4) +e)= (lambda)/(2)`
`:. I_(1) = I_(2) - (lambda)/(2) = 54 - 35 = 19 cm `
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