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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• A train moves towards a stationary observer with speed 34 m/s. The train sounds a whistle and its frequency registered by the observer is ${{f}_{1}}$. If the train’s speed is reduced to 17 m/s, the frequency registered is ${{f}_{2}}$. If the speed of sound is 340 m/s then the ratio ${{f}_{1}}/{{f}_{2}}$ is

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• At what temperature velocity of sound is double than that of at 0°C

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• At nodes in stationary waves

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• With the propagation of a longitudinal wave through a material medium, the quantities transmitted in the propagation direction are

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