In an Experiment to Determine... |JEE Main 2022| Sound Waves

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JEE MAIN 2022

29-06-22 S2

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In an experiment to determine the velocity of sound in air at room temperature using a resonance is observed when the air column has a length of 20.0 cm for a tuning fork of frequency 400 Hz is used. The velocity of the sound at room temperature is 336 $\mathrm{ms}^{-1}$. The third resonance is observed when the air column has a length of ____cm.

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