Question 131: Waves

Question

In an experiment with a closed organ pipe, it is filled with water by $\left(\frac{1}{5}\right)$ th of its volume. The frequency of the fundamental note will change by

Accepted Answer

$$\begin{aligned}
&\lambda_1=4 \ell\
&\mathrm{f}_1=\frac{\mathrm{v}}{4 \ell}
\end{aligned}$$
$$\begin{aligned}
& \lambda_2=\frac{16 \ell}{5} \
& \mathrm{f}_2=\frac{5 \mathrm{~V}}{16 \ell} \
& \frac{\Delta \mathrm{f}}{\mathrm{f}}=\frac{\frac{\mathrm{V}}{\ell}\left(\frac{1}{16}ight)}{\frac{\mathrm{V}}{4 \ell}} 	imes 100=25 \%
\end{aligned}$$

Answer

$20 \%$

Answer

$25 \%$

Answer

$-20 \%$

Answer

$-25 \%$

Waves

In an experiment with a closed organ pipe, it is filled with water by \left(\frac{1}{5}\right) th of its volume. The frequency of the fundamental note will change by

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