waves

Related Questions

• A source of sound and listener are approaching each other with a speed of 40 m/s. The apparent frequency of note produced by the source is 400 cps. Then, its true frequency (in cps) is (velocity of sound in air = 360 m/s)

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• Equation of the progressive wave is given by : $y=a\sin \pi (40t-x)$ where $a$ and $x$ are in metre and $t$ in second. The velocity of the wave is

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• 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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• A closed pipe and an open pipe have their first overtones identical in frequency. Their lengths are in the ratio

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• Two sound waves of slightly different frequencies propagating in the same direction produce beats due to

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