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In a resonance tube to determine the speed of sound in air was found that's...

In a resonance tube to determine the speed of sound in air was found that's a loud sound was heard when the water was L1= 34.0cm
below the open end of the tube and again when the water level was L2= 99.0 cm. the frequency of the tuning fork placed above the open end of the tube is 256hz. Calculate the speed of the sound in air column of the tube?

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