A source emits sound of frequency $f$. An observer is moving towards the source with velocity $v_o$ and the source is moving away from the observer with velocity $v_s$. If $v$ is the velocity of sound, the apparent frequency heard by the observer is:

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 $A$

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 sound waves (expressed in $CGS$ units) given by ${y_1} = 0.3\,\,\sin \frac{{2\pi }}{\lambda }\left( {vt - x} \right)$ and ${y_2} = 0.4\sin \frac{{2\pi }}{\lambda }\left( {vt - x + heta } \right)$ interfere. The resultant amplitude at a place where phase difference is $\pi /2$ will be

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

Two monochromatic coherent light beams A and B have intensities $I$ and $\frac{I}{4}$ respectively. If these waves are superposed, the maximum and minimum intensities will be

If C is rms speed of molecules in a gas and ‘v’ is the speed of sound waves in the gas, the value of $c/v$ for all diatomic gases is

A man sets his watch by the sound of a siren placed at a distance $1\,\,km$ away. If the velocity of sound is $330\,\,m/s$

The fundamental frequency of a sonometre wire is $n$. If its radius is doubled and its tension becomes half, the material of the wire remains same, the new fundamental frequency will be

The intensity of sound from a radio at a distance of $2\,\,metres$ from its speaker is $1 imes {10^{ - 2}}\mu W/{m^2}$. The intensity at a distance of $10\,\,metres$ would be

A sound wave travels through a medium with a bulk modulus $B$ and density $\rho$. If the medium is suddenly compressed such that its density becomes $1.5\rho$ while the temperature remains constant, what is the new speed of sound in the medium?