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General
Easy
Question
An open pipe resonates to a frequency f1 and a closed pipe resonates to a frequency f2. If they are joined together to form a longer tube, then it will resonate to a frequency of (neglect end corrections)
The correct answer is:
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A closed pipe is suddenly opened and changed to an open pipe of same length. The funda-mental frequency of the resulting open pipe is less than that of 3rd hoarmonic of the ear-lier closed pipe by 55Hz. Then, the value of fundamental frequency of the closed pipe is
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A source of sound is travelling at null along a road, towards a point A. When the source is 3m away from A, a person standing at a point O on a road perpendicular to the track hears a sound of frequency ‘n ’. The distance of O from A at that time is 4m. If the original frequency is 640 Hz, then the value of n is (given velocity of sound null
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A long rubber tube having mass 0.9kg is fastened to a fixed support and the free end of the tube is attached to a chord which passes over a pulley and supports an object, with a mass of 5kg as shown in figure. If the tube is struck by a transverse blow at one end, the time required for the pulse to reach the other end is
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A plane progressive wave is shown in the adjoining phase diagram. The wave equation of this wave, if its position is shown at t=0, is
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