2.21 Four concurrent forces act on the center of mass of a landing airplane. Calculate the resultant force and the angle it makes with the x axis. F₁ = 2000 lb F3 = 500 lb 45° F₂ = 1000 lb 30° F4 = 2000 lb

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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.