A hollow aluminum tube used in a roof structure has an outside diameter of 104 mm and an inside diameter of 82 mm. The tube is 2.75 m long, and the aluminum has shear modulus 28 GPa. If the tube is twisted in pure torsion by torques acting at the ends, what is the angle of twist (in degrees) when the maximum shear stress is 48 MPa? 3.5 5.19 6.13 none of the above

Q: you did not derive an equation you only did an explanation thumbs down

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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.