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Power has different meanings when talking about different subjects:

  • Power (physics), how fast energy can be changed into work
  • In sociology, power is when a person wants another to do something, and they do it. This might also be called influence or control.
  • Electric power, electricity that comes from power plants or generators
  • Statistical power, how likely the test is to say something is true when it is really true
  • Exponentiation; in mathematics, "power" is multiplying a number by itself. In the expression 23, where we multiply 3 2's together ( 2 * 2 * 2 ) we say that 2 is raised to the power of 3
  • A life force, called chi by the Chinese and kiai by the Japanese.
  • In politics a great power is more powerful than other countries.

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