Aluminum beam AB (E=10x106 psi) is simply supported as shown. Magnesium rod CD (a = 14.5 x 106 in/in/°F and E=6.5x106 psi) with cross-sectional area A=1.0 in² and length l=12"is connected to AB via a pin joint as shown. It is unloaded at room temperature. If the temperature in CD is reduced by 100 degrees: Determine the deflection of beam AB at point C Determine the magnitude of the maximum bending stress in beam AB and its location (x coordinate) along its length Determine the magnitude of the maximum horizontal shear stress in beam AB and identify its location on the beam cross-section. 8 ft 2" 6 ft 4" A B Beam cross-section D

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Q: Hi, can you help by explaining Part D above?

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Entropy

In physics, entropy means the amount of disorder or the degree of randomness associated with a thermodynamic system. The system is not self-organized when the entropy of the system is high. For instance, when a system is at an elevated temperature, its molecules are in random motion, vibrating and colliding with each other. During this scenario, the probability of finding a molecule at a particular place twice, is low. Under this circumstance, the system can be said to be in a high entropy.