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Sahay Sir > Question Answers > Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions) > A cylindrical block of length 0.4 m and area of cross-section 0.04m^2 is placed coaxially on a thin metal disc of mass 0.4 kg and of the same cross – section. The upper face of the cylinder is maintained at a constant temperature of 400 K and the initial temperature of the disc is 300K. if the thermal conductivity of the material of the cylinder is 10watt/mK and the specific heat of the material of the disc is

A cylindrical block of length 0.4 m and area of cross-section 0.04m^2 is placed coaxially on a thin metal disc of mass 0.4 kg and of the same cross – section. The upper face of the cylinder is maintained at a constant temperature of 400 K and the initial temperature of the disc is 300K. if the thermal conductivity of the material of the cylinder is 10watt/mK and the specific heat of the material of the disc is

estimate the surface temperature of the sun. Stefan's constant The earth receives solar energy at the rate of 2 cal−cm^−2 per minute. Assuming the radiation to be black body in character