When bars AB and CD are rigidly attached to the left and right walls a gap s remains between the flanges at B and C. Both bars have the same Young's modulus, E, and coefficient of thermal expansion, a. Determine: a. The stress in each bar after the flange bolts are tightened to close the gap. b. The change in temperature required so that there is no stress when the gap is closed. p- B 2a S- N/3

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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.