The stationary wave $y = 2a{\mkern 1mu} \,\,sin\,\,{\mkern 1mu} kx{\mkern 1mu} \,\,cos{\mkern 1mu} \,\omega t$ in a stretched string is the result of superposition of $y_1 = a\,sin\,(kx -\omega t)$ and
${y_2}\, = \,a\,\cos \,\left( {kx\, + \,\omega t} \right)$
${y_2}\, = \,a\,\sin \,\left( {kx\, + \,\omega t} \right)$
${y_2}\, = \,a\,\cos \,\left( {kx\, - \,\omega t} \right)$
${y_2}\, = \,a\,\sin \,\left( {kx\, - \,\omega t} \right)$
The length of open organ pipe is $L$ and fundamental frequency is $f$. Now it is immersed into water upto half of its length now the frequency of organ pipe will be
Waves of displacement amplitude $A$ and angular frequency $\omega $ travel in air with the same velocity. Which of the following waves has the highest intensity
A racing car moving towards a cliff sounds its horn. The driver observes that the sound reflected from the cliff has a pitch one octave higher than the actual sound of the horn. If $v$ is the velocity of sound, the velocity of the car will be
Four tuning forks of frequencies $200,201, 204$ and $206\, Hz$ are sounded together. The beat frequency will be
A sound absorber attenuates the sound level by $20\,\, dB$. The intensity decrease by a factor of