Let frequency of tuning fork be \(f\).
From question we know the frequencies of sonometer wire \(\left(\frac{v}{21}\right)\) are \(\frac{v}{2 \times 0.2}\) and \(\frac{v}{2 \times 0.21}\)
\(\operatorname{Now} \frac{v}{0.4}-f=8\)
\(f-\frac{v}{0.42}=5 \quad \dots(ii)\)
Solving \((i)\) and \((ii)\), answer is \((c)\)
(વાયુનો અચળાંક $R=8.3 \;JK ^{-1} mol ^{- 1}$ લો)
$y=\left(10 \cos \pi x \sin \frac{2 \pi t }{ T }\right) cm$
$x=\frac{4}{3} cm$ આગળ રહેલા કણનો કંપવિસ્તાર.....$cm$ હશે