What is minimum length of a tube, open at both ends, that resonates with tuning fork of frequency $350 Hz$ ? [velocity of sound in air $= 350 m/s$] ..... $cm$
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(a) Fundamental frequency $n = \frac{v}{{2l}}$
$ \Rightarrow 350 = \frac{{350}}{{2L}}$
$ \Rightarrow L = \frac{1}{2}m = 50\,cm.$
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