waves

Related Questions

• Which two of the given transverse waves will give stationary waves when get superimposed<br> ${{z}_{1}}=a\cos (kx-\omega \,t)$.....(A)<br> ${{z}_{2}}=a\cos (kx+\omega \,t)$ .....(B)<br> ${{z}_{3}}=a\cos (ky-\omega \,t)$ .....(C)

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• A source of sound is travelling with a velocity 40 km/hour towards observer and emits sound of frequency 2000 Hz. If velocity of sound is 1220 km/hour, then what is the apparent frequency heard by an observer

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• A source is moving towards an observer with a speed of 20 m/s and having frequency of 240 Hz. The observer is now moving towards the source with a speed of 20 m/s. Apparent frequency heard by observer, if velocity of sound is 340 m/s, is

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• A 1 cm long string vibrates with fundamental frequency of 256 Hz. If the length is reduced to $\frac{1}{4}cm$ keeping the tension unaltered, the new fundamental frequency will be

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• An organ pipe ${{P}_{1}}$ closed at one end vibrating in its first overtone and another pipe ${{P}_{2}}$ open at both ends vibrating in its third overtone are in resonance with a given tuning fork. The ratio of lengths of ${{P}_{1}}$ and ${{P}_{2}}$ is

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