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qUESTIONS

Which of the following is not a thermodynamic co-ordinate?

Air in a cylinder is suddenly compressed by a piston, which is then maintained at the same position. With the passage of time

Which of the following parameters does not characterize the thermodynamic state of matter

Which of the following is incorrect regarding the first law of thermodynamics?

Consider a spherical shell of radius R at temperature T. The black body radiation inside it can be considered as an ideal gas of photons with internal energy per unit volume u= U/V α T^ 4 and pressure P = 1/3 x (U/V) If the shell now undergoes an adiabatic expansion the relation between T and R is

Consider an ideal gas confined in an isolated closed chamber. As the gas undergoes an adiabatic expansion, the average time of collision between molecules increases as V^q, where V is the volume of the gas. The value of q is (γ=Cp/Cv)

A diatomic ideal gas is used in a Carnot engine as the working substance. If during the adiabatic expansion part of the cycle the volume of the gas increases from V to 32 V, the efficiency of the engine is

A monoatomic ideal gas, initially at temperature T1, is enclosed in a cylinder fitted with a frictionless piston. The gas is allowed to expand adiabatically to a temperature T2 by releasing the piston suddenly. If L1 and L₂ are the lengths of the gas column before and after expansion respectively, then T1/T2 is given by

Reason of weightlessness in a satellite is

If the distance between two masses is doubled, the gravitational attraction between them

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