Avertical cylinder 180 cm tall and 30 cm in diameter might be used to approximate a man for of the cylinder is 25°c, the surface emissivity is ? 0.9. heat transfer calculations. assume that the surface temperature convective heat transfer coefficient h 12 w/m2.°c, and the furthermore, assume that the cylinder is placed in a large room where the air temperature is 20°c and the wall temperature is 10°c. calculate the rate of heat lost from the cylinder

1in2 processor chip can be modelled as an isothermal plane wall of silicon, isothermal on both sides. the power input to the bottom of the plane wall, or the processing power of the chip, often called the thermal design power (tdp), is 100w. assume the periphery is adiabatic. the silicon is 400 microns thick. the temperature at the junction, or in this case on the bottom of the isothermal plane wall, is 85°c. what is the top surface temperature, assuming that the only mode of heat transfer is conduction