An 800-W iron is left on the iron board with its base exposed to the air at

Question:

An 800-W iron is left on the iron board with its base exposed to the air at 20°C. The convection heat transfer coefficient between the base surface and the surrounding air is 35 W/m²·K. If the base has an emissivity of 0.6 and a surface area of 0.02 m², determine the temperature of the base of the iron.

20°C Iron 800 W