n the diagram below, metal 1 is made of gold and metal 2 is aluminum. Both bars have the same length and area of cross-section but their thermal conductivities are different. The emperature Th is maintained at a constant 88.0°C at the end A while the temperature T, at the end B is maintained at 19.0°C. T metal 1 metal 2 Tj (a) What is the temperature T; at the junction of the two bars? The thermal conductivity of gold is 318 J/(s · m. °C) and that for aluminum is 220 J/(s •m. °C). °C (b) If metals 1 and 2 are now interchanged, but the values of Th and T. are the same as in part (a), what will be the temperature of the junction? °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.