waves

Related Questions

• A closed pipe and an open pipe have their first overtones identical in frequency. Their lengths are in the ratio

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• The equation of the propagating wave is $y=25\sin (20t+5x),$ where $y$ is displacement. Which of the following statement is not true

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• The equation of progressive wave is $y=a\sin (200\,t-x)$. where $x$ is in meter and $t$ is in second. The velocity of wave is

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• Two trains are moving towards each other at speeds of 20 m/s and 15 m/s relative to the ground. The first train sounds a whistle of frequency 600 Hz. the frequency of the whistle heard by a passenger in the second train before the train meets is (the speed of sound in air is 340 m/s)

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• A source of sound of frequency 90 vibrations/ sec is approaching a stationary observer with a speed equal to 1/10 the speed of sound. What will be the frequency heard by the observer

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