Consider an acrylic sheet of thickness L = 5.2 mm that is used to coat a hot, isothermal metal substrate at T = = 300°C. The properties of the acrylic are p = 1990 kg/m³, c = 1470 J/kg-K, and k 0.21 W/m.K. Neglecting the thermal contact resistance between the acrylic and the metal substrate, determine how long, in s, it will take for the insulated back side of the acrylic to reach its softening temperature, Tsoft = 90°C. The initial acrylic temperature is T, = 20°C. *

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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.