A thin triangular plate PQR forms a right angle at point Q. During deformation, point Q moves to the left by u = 3.0 mm and upward by v = 3.1 mm to new position Q'. Determine the shear strain y at corner Q' after deformation. Use c = 685 mm, a = 26°, and 3 = 64°. P KI R Answer: Y = i urad

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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.