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How do you derive Newton’s law of cooling from Stefan’s

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Define the terms reflectance, absorptance and transmittance. How are they

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Discuss briefly energy distribution of a black body radiation. Hence deduce wien’s displacement

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Calculate difference in efficiency of a Carnot energy working between:-1) 400K and 350K2) 350K and

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Derive Avogadro’s

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What are the assumptions of kinetic theory of

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Two perfect gases at absolute temperature T1 and T2 are mixed. There is no loss of energy. Find the temperature of the mixture if the masses of molecules are `m_1 and m_2` and number of molecules is `n_1 and n_2`

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If Nine particles have speeds of 5, 8, 12, 12, 12, 14, 14, 17 and 20 m/s. find :→1) the average speed2) the Most Probable speed3) the r.m.s. Speed of the

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Establish the relation between ` (gamma=(C_P)/(C_V))`and degrees of freedom

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Find the centre of mass of three particles at the vertices of an equilateral triangle. The masses of the particles are 100g, 150g, and 200g respectively. Each side of the equilateral triangle is 0.5m

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Find the centre of mass of a triangular

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Find the centre of mass of a uniform L-shaped lamina (a thin flat plate) with dimensions as shown. The mass of the lamina is 3

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Find the scalar and vector products of two vectors. `a=(3hati-4hatj+5hat)` and

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Find the torque of a force `7hati+3hatj-4hatk` about the origin. The force acts on a particle whose position vector is

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Show that the angular momentum about any point of a single particle moving with constant velocity remains constant throughout the

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Show that moment of a couple does not depend on the point about which you take the

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A metal bar 70 cm long and 4.00 kg in mass supported on two knife-edges placed 10 cm from each end. A 6.00 kg load is suspended at 30 cm from one end. Find the reactions at the knifeedges.(Assume the bar to be of uniform cross section and

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

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A 3m long ladder weighing 20 kg leans on a frictionless wall. Its feet rest on the floor 1 m from the wall as shown in Fig.. Find the reaction forces of the wall and the floor.

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The angular speed of a motor wheel is increased from 1200 rpm to 3120 rpm in 16 seconds. (i) What is its angular acceleration, assuming the acceleration to be uniform? (ii) How many revolutions does the engine make during this

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A cord of negligible mass is wound round the rim of a fly wheel of mass 20 kg and radius 20 cm. A steady pull of 25 N is applied on the cord as shown in Fig. . The flywheel is mounted on a horizontal axle with frictionless bearings. (a) Compute the angular acceleration of the wheel. (b) Find the work done by the pull, when 2m of the cord is unwound. (c) Find also the kinetic energy of the wheel at this point. Assume that the wheel starts from rest. (d) Compare answers to parts (b) and (c).

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

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