Sahay Sir > Question Answers > Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions) > Two identical containers A and B with frictionless pistons contain the ideal gas at the same temperature and the same volume V. The mass of the gas in A is m A ​ and in B is m B ​ . The gas in each cylinder is now allowed to expand isothermally to the same final volume 2V. The changes in pressure in A and B are found to be Δp and 1.5ΔP respectively. Then:

Two identical containers A and B with frictionless pistons contain the ideal gas at the same temperature and the same volume V. The mass of the gas in A is m A ​ and in B is m B ​ . The gas in each cylinder is now allowed to expand isothermally to the same final volume 2V. The changes in pressure in A and B are found to be Δp and 1.5ΔP respectively. Then:

calculate the initial rate of rise of temperature of the sphere The sphere may be treated as a black body rho_(copper) =8.93xx 10^(3)kg//m^(3) s = 3.7xx10^(2) Jkg^(-2) K^(-1) sigma = 5.7 xx 10^(8) Wm^(-2) K^(-4) . solid copper sphere of dimater 10mm is cooled to temperature of 150K and is then placed in an enclousure at 290K Assuming that all interchange of heat is by radiation