Standing Waves

The ratio of first harmonic of open organ pipe and closed organ pipe for the same length is

fundamental frequency of closed organ pipe is ( $\mathrm{V}=$velocity of sound in air, $\mathrm{L}=$Length of organ pipe)

Fundamental frequency of open organ pipe is ( $\mathrm{V}=$Velocity of sound in air, $\mathrm{L}=$Length of pipe)

For a organ pipe of length $L$, closed at both ends, the first displacement node is presend at :

The fundamental frequency of a string is proportional to.

Which one of the following statement is false for the normal modes of oscillations of air column open at one end?

Cotyledons are also called-

A stretched wire emits a fundamental note of $256 \mathrm{H}\mathrm{z}$. Keeping the stretching force constant and reducing the length of wire by $10 \mathrm{c}\mathrm{m}$, the frequency becomes $320 \mathrm{H}\mathrm{z}$, the original length of the wire is

A pipe $30 \mathrm{c}\mathrm{m}$long, is open at both ends. Which harmonic mode of the pipe resonates a $1.1 \mathrm{k}\mathrm{H}\mathrm{z}$ source?
(Speed of sound in air$=330 \mathrm{m}\mathrm{ }{\mathrm{s}}^{-1}$)

A steel rod of length $100 \mathrm{cm}$ is clamped at the middle. The frequency of the fundamental mode of the rod is: (Speed of sound in steel $=5\mathrm{ }\mathrm{km} {\mathrm{s}}^{-1}$)

In stationary waves, nodes are the points where there is:

The disc of a siren containing 60 holes rotates at a constant speed of 360 rpm. The emitted sound is in unison with a tuning fork of frequency

A note has a frequency 128 Hz. The frequency of a note two octaves higher than it is

The fundamental frequency of a closed organ pipe is equal to second overtone of an open organ pipe. If the length of closed organ pipe is $15 \mathrm{cm}$. The length of open organ pipe is

The equation of a standing wave on a string is $y(x,t)=0.06\sin \left(\frac{2\mathrm{\pi x}}{3}\right)\cos \left(120\mathrm{\pi t}\right)$. The amplitude of a point $0.375 \mathrm{m}$ away from the end $x=0$ is

A stretched string of length 2m vibrates in 4 segments. The distance between consecutive nodes is