A solid circular rod with a diameter d= 16 mm is shown in Figure Q-3. The rod is made Q-3 of an aluminum alloy that has an elastic modulus E = 72 GPa and a Poisson's ratio v= 0.33. When subjected to the axial load P, the diameter of the rod decreases by 0.024 mm. a) Determine the magnitude of load P. b) If we have a 10 mm diameter hole theough the rod, making it a hollow member (a pipe), other things remaining the same as in part (a), determine the magnitude of load P P Figure Q-3

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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.