Have you ever wondered what is the efficiency of a domesticelectric stove if you were to boil a pot of water?

Let us find out. First let us define the efficiency (?stove) asthe ratio of the rate of heat transfer that is provided to thewater to the power provided to the burner.

Assume the pot is made of stainless steel and a diameter of 8inches and a height of 6 inches. Also assume that the water isboiling.

ALL external surfaces (including the bottom) of the potexperiences convection and radiation with the surroundings at 20°C.The heat transfer coefficient (h) is 8.0 W/m2 -K and the emissivityis 0.7. The total heat input heat rate into the pot is qstove = 1.2kW. Calculate ?stove