1. Figure shows (not drawn in scale) a slider-crank mechanism in which the resultant gas pressure 8×104 N/m² acts on the piston of cross sectional area 0.1 m². The system is kept in equilibrium as a result of the couple applied to the crank 2, through the shaft at O₂. OA = 100 mm, AB = 450 mm and 0=45º. Determine analytically, (without considering inertia effects) i) the forces acting on all the links (including the pins) and ii) the couple on link 2. A 2 T₂ P 45° 1 B

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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.