In the figure, a single lap riveted joint is shown. The diameter of the rivets is d = 20 mm, plate sizes are t = 18 mm, tz = 12 mm, b = 100 mm and e = 38 mm. The allowable shear stress is Tallow = 100 MPa, allowable bearing and tensile stresses are o'attow = 280 MPa and dallow = 160 MPa. Calculate the tensile force P that this joint can safely carry. P

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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.