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IMPORTANT
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A pipe of length 85 cm is closed from one end. Find the number of possible natural oscillations of air column in the pipe whose frequencies lie below 1250 Hz. The velocity of sound in air is 340 m/s.

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Important Questions on Mechanical Wave

MEDIUM
JEE Main
IMPORTANT
A sonometer wire of length 1.5m is made of steel. The tension in it produces an elastic strain of 1% . What is the fundamental frequency of steel if density and elasticity of steel are 7.7×103 kg m-3 and 2.2×1011 N m-2 respectively?
EASY
JEE Main
IMPORTANT
Two travelling waves of equal amplitudes and equal frequencies move in opposite directions along a string. They interfere to produce a stationary wave whose equation is given by y=10cosπxsin2πtTcm. The amplitude of the particle at x=43 cm will be _____ cm.
MEDIUM
JEE Main
IMPORTANT
The first overtone frequency of an open organ pipe is equal to the fundamental frequency of a closed organ pipe. If the length of the closed organ pipe is 20 cm. The length of the open organ pipe is _____ cm
EASY
JEE Main
IMPORTANT
A set of 20 tuning forks is arranged in a series of increasing frequencies. If each fork gives 4 beats with respect to the preceding fork and the frequency of the last fork is twice the frequency of the first, then the frequency of last fork is _____ Hz.
EASY
JEE Main
IMPORTANT
If a wave gets refracted into a denser medium, then which of the following is true?
MEDIUM
JEE Main
IMPORTANT
The velocity of sound in a gas, in which two wavelengths 4.08 m and 4.16 m produce 40 beats in 12 s, will be
HARD
JEE Main
IMPORTANT
A tunning fork of frequency 340 Hz resonates in the fundamental mode with an air column of length 125 cm in a cylindrical tube closed at one end. When water is slowly poured in it, the minimum height of water required for observing resonance once again is _____ cm.
(Velocity of sound in air is 340 ms-1)
MEDIUM
JEE Main
IMPORTANT
A longitudinal wave is represented by y=10sin2πnt-xλ cm. The maximum particle velocity will be four times the wave velocity if the determined value of wavelength is equal to