waves

Related Questions

• A source of frequency 150 Hz is moving in the direction of a person with a velocity of 110 m/s. The frequency heard by the person will be (speed of sound in medium = 330 m/s)

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• A steel rod 100 cm long is clamped at its mid-point. The funda-mental frequency of longitudinal vibrations of the rod is given to be 2.53 kHz. What is the speed of sound in steel

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• Two sound waves (expressed in CGS units) given by ${{y}_{1}}=0.3\sin \frac{2\pi }{\lambda }(vt-x)$ and ${{y}_{2}}=0.4\sin \frac{2\pi }{\lambda }(vt-x+\theta )$ interfere. The resultant amplitude at a place where phase difference is $\pi /2$ will be

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• 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 string in musical instrument is 50 cm long and its fundamental frequency is 800 Hz. If a frequency of 1000 Hz is to be produced, then required length of string is

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