Physics - Thermodynamics Question with Solution | TestHub

A solid sphere of diameter 0.1 cm is at 227°C and is kept in an enclosure at 27°C. Its rate of temperature change is $\mathrm{X}(\mathrm{K}/\sec )$. Find the value of 100 X .(Stefan's constant : $6\times 10^{-8}\mathrm{W}/{\mathrm{m}}^2{\mathrm{K}}^4$, emissivity of the surface 0.7 , specific heat $0.1\mathrm{kcal}/\mathrm{kg}\mathrm{K}$, density $=8\times 10^3\mathrm{kg}/{\mathrm{m}}^3,\mathrm{J}=4200\mathrm{J}/\mathrm{k}\mathrm{cal}$.)