An air column, closed at one end and open at the other, resonates with a tuning fork when the smallest length of the column is 50 cm. The next larger length of the column resonating with the same tuning fork is:

Standing waves are produced by the superposition of two waves ${y_1} = 0.05\,\,\,\sin \left( {3\pi t + 2x} \right)$

${y_2} = 0.05\,\,\sin \left( {3\pi t + 2x} \right)$ Where $x$ and $y$ are in meters and $t$ is in second. What is the amplitude of the particle at $x = 0.5$ ? Given $\cos \,\,{57.3^0} = 0.54$.

Two waves are approaching each other with a velocity of $16\,\,m/s$ and frequency $n$. The distance between two consecutive nodes is

An underwater sonar source operating at a frequency of $60\,\,kHz$ directs its beam towards the surface. If the velocity of sound in air is $330\,\,m/s$, the wavelength and frequency of waves in air are:

A point source emits sound equally in all directions in a non-absorbing medium. Two points $P\,\,and\,\,Q$ are at distance of $2{\mkern 1mu} \,\,m\,\,and\,\,3{\mkern 1mu} {\mkern 1mu} \,m$ respectively from the source. The ratio of the intensities of the waves at $P\,\,and\,\,Q$ is

If at same temperature and pressure, the densities for two diatomic gases are respectively ${d_1}$ and ${d_2}$, then the ratio of velocities of sound in these gases will be

The time of reverberation of a room A is one second. What will be the time (in seconds) of reverberation of a room, having all the dimensions double of those of room $A$

On which principle does sonometer works?

The transverse displacement of string fixed at both ends is given by $y = 0.06\,\sin \left( {\frac{{2\pi x}}{3}} \right)\cos \left( {120\,\pi t} \right)$, where x and y are in metre and t is in second. The length of the string is 1.5m and its mass is $3 imes {10^{ - 2}}\,\,kg$ . The tension in the string is equal to

A sound absorber attenuates the sound level by $20{\rm{ }}dB$. The intensity decreases by a factor of

It takes $2.0{\rm{ }}s$ for a sound wave to travel between two fixed points when the day temperature is $10^\circ C$. if the temperature rises to $30^\circ C$ the sound wave travels between the same fixed parts in