A square high-density polyethylene [a - 158x10-6/°C] plate has a width of 250 mm. A 150 mm diameter circular hole is located at the center of the plate. If the temperature of the plate increases by 37°C, determine: (a) the change in width of the plate. (b) the change in diameter of the hole.

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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.