waves

Related Questions

• An observer moves towards a stationary source of sound of frequency n. The apparent frequency heard by him is 2n. If the velocity of sound in air is 332 m/sec, then the velocity of the observer is

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• The equation of progressive wave is $y=0.2\sin 2\pi \left[ \frac{t}{0.01}-\frac{x}{0.3} \right]$, where $x$ and $y$ are in metre and $t$ is in second. The velocity of propagation of the wave is

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• The displacement of a particle is given by $x=3\sin (5\pi \,t)+4\cos (5\pi \,t)$. The amplitude of the particle is

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• Fundamental frequency of pipe is 100 Hz and other two frequencies are 300 Hz and 500 Hz then

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• A siren placed at a railway platform is emitting sound of frequency 5 kHz. A passenger sitting in a moving train A records a frequency of 5.5 kHz while the train approaches the siren. During his return journey in a different train B he records a frequency of 6.0 kHz while approaching the same siren. The ratio of the velocity of train B to that of train A is

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