waves

Related Questions

• Sound waves in air are

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• A source of sound emits waves with frequency f Hz and speed V m/sec. Two observers move away from this source in opposite directions each with a speed 0.2 V relative to the source. The ratio of frequencies heard by the two observers will be

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• Velocity of sound waves in air is $330 m/sec$. For a particular sound in air, a path difference of $40 cm$ is equivalent to a phase difference of $1.6 \pi$. The frequency of this wave is

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• A man is standing between two parallel cliffs and fires a gun. If he hears first and second echoes after 1.5 s and 3.5s respectively, the distance between the cliffs is (Velocity of sound in air = 340 m/s)

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• The equation of a stationary wave is $y=0.8\cos \,\left( \frac{\pi x}{20} \right)\sin 200\,\pi t$, where x is in cm and t is in sec. The separation between consecutive nodes will be

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