A rigid horizontal bar of negligible mass is connected to two rods as shown. If the system is initially stress-free. Calculate the temperature change that will cause a tensile stress of 90 MPa in the brass rod Assume that both rods are subjected to the change in temperature Brass L=2m A = 1200 mm² E = 100 GPa a = 18.7 µm/(m °C) 3m Copper L=3m A-1500 mm E- 120 GPa a = 16.8 µm/(m*C)

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Mechanisms of heat transfer

Heat transfer is an essential discipline in thermal engineering that deals with the transfer, conversion, usability, and creation of heat or thermal energy. Transfer of heat occurs through various mechanisms like conduction, convection, radiation, and change of phases. All these mechanisms have distinct characteristics, but these mechanisms can simultaneously occur in an identical system.