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qUESTIONS

The first law of thermodynamics is concerned with the conservation of

The excess pressure inside a soap bubble of radius 2 cm is 50 dyne/cm². The surface tension is:

The work done in blowing a soap bubble of radius R is Wat room temperature. Now the soap solution is heated. From the heated solution another soap bubble of radius 2R is blown and the work done is ‘W2’ Then:

The length of the seconds pendulum is 1 m on earth. If the mass and diameter of any planet is 1.5 times that of the earth, the length of the seconds pendulum on that planet will be nearly

A particle starts oscillating simple harmonically from its equilibrium position. Then the ratio of kinetic and potential energy of the particle at time T / 12 is ( T – time period)

The time taken by a particle executing simple harmonic motion of period ‘T’ to move from the mean position to half the maximum displacement is

The bob of a simple pendulum of ‘length ‘l’ is pulled through an angle ‘θ’ from its equilibrium position and them released. When it passes through its equilibrium position, its speed is given by: (g = acceleration due to gravity)

A body of mass ‘M’ executes SHM Along x-axis with frequency ‘n’. At a distance x from the mean position, the body has kinetic energy ‘K’ and potential energy ‘P’. The amplitude of oscillation of the SHM is

The kinetic energy of a particle executing a linear SHM is 16 J, when it is in the mean position. If the amplitude is 25 cm, periodic time of the particle in second is (Mass of the particle = 51.2 g)

The instantaneous displacement of a simple harmonic oscillator is given by Y = A cos(ωt + π/4) Its speed will be maximum at the time [ sin 90 deg = cos 0 deg = 1, sin 0 deg = cos 90 deg = 0 ]

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