Power Quotes

Power refers to ability to do or undergo something. It commonly describes a large amount or number, any of the elementary forms or parts of machines: three primary (the lever, inclined plane, and pulley) and three secondary (the wheel-and-axle, wedge, and screw), and a measure of the effectiveness that a force producing a physical effect has over time. If linear, the quotient of: (force multiplied by the displacement of or in an object) ÷ time. If rotational, the quotient of: (force multiplied by the angle of displacement) ÷ time, which gives the term a broader and more practical sense than a single short definition would suggest. Depending on context, it can also point to a product of equal factors (and generalizations of this notion): x^n, read as "x to the power of n" or the like, is called a power and denotes the product x \times x \times \cdots \times x, where x appears n times in the product; x is called the base and n the exponent, cardinality, and the probability that a statistical test will reject the null hypothesis when the alternative hypothesis is true, so the category can cover literal uses, related ideas, and more figurative extensions of the same core meaning. Taken together, these meanings present Power as a flexible theme rather than a narrowly technical label, covering the central idea people usually mean when they use the word while still leaving room for closely related senses that appear in real language.

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