waves

Related Questions

• A car sounding a horn of frequency 1000 Hz passes an observer. The ratio of frequencies of the horn noted by the observer before and after passing of the car is $11 : 9$. If the speed of sound is $v$, the speed of the car is

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• Two waves are represented by ${{y}_{1}}=a\sin \left( \omega \,t+\frac{\pi }{6} \right)$ and ${{y}_{2}}=a\cos \omega \,t$. What will be their resultant amplitude

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• Two tuning forks A and B vibrating simultaneously produce 5 beats. Frequency of B is 512. It is seen that if one arm of A is filed, then the number of beats increases. Frequency of A will be

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• Two waves having the intensities in the ratio of 9 : 1 produce interference. The ratio of maximum to the minimum intensity, is equal to

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• With what velocity an observer should move relative to a stationary source so that he hears a sound of double the frequency of source

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