A heat sink is supported by three posts made of A-36 steel and brass, as shown in the figure. The sink is subject to a uniform loading of 50 kN/m along its 800 mm length. The circular posts have a length of 400 mm when no load is applied to the bar, and the temperature is 20 degrees Celsius. Complete the following tasks: 1) Determine the force supported by each post if the bar is subjected to a distributed load and the temperature is raised to 100 degrees. The heat expansion coefficient of brass is 18 x 10 m/mC and of A-36 steel is 12 x 10-6 m/mc. The modulus of elasticity for A-36 steel is 200 GPa and for brass is 110 GPa. 2) Determine whether the posts will enter the plastic region or not. The yield strength of A-36 steel is 250 MPa and for brass is 95 MPa. Justify your answer with calculated values. 30 mm Steel 800 mm 50 kN/m 50 mm Brass 400 mm Steel

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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.