\(\mathrm{f} \propto \mathrm{v} \propto \sqrt{\mathrm{T}}\)
\(\frac{\mathrm{f}_1}{\mathrm{f}_2}=\sqrt{\frac{\mathrm{T}_1}{\mathrm{~T}_2}}=\sqrt{\frac{300}{400}}\)
\(\mathrm{f}_2=\sqrt{\frac{4}{3}}=\mathrm{f}_1=\frac{2}{\sqrt{3}} \mathrm{Z}\)
( $R =2 cal mole { }^{-1} K ^{-1}$ લો.)