A layer of pulverized cork 152-mm thick is used as a layer of thermal insulation in a flat wall. The temperature of the cold side of the cork is 4.4℃, and that of the warm side is 82.2℃. The thermal conductivity of the cork at 0 ℃ is 0.036 W/(m · ℃ ), and that at 93.3 ℃ is 0.055 W/(m · ℃ ). The area of the wall is 4.64 m2. What is the rate of heat flow through the wall in watts?

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Conduction and Convection

When energy travels from one object to another it is said to have undergone heat transfer. Heat transfer is nothing but the transfer of thermal energy or internal energy from one thing to another, like e.g., when a vessel with water, kept on top of a burner, heats up because of the flame underneath it.