Power

From Simple English Wikipedia, the free encyclopedia

English Wiktionary
English Wiktionary has a dictionary definition (word meaning) for:

Power has different meanings when talking about different subjects:

  • In physics, power is how fast energy can be changed into work. Power is measured in watts.
  • In sociology, power is when a person tells another to do something, and they do it. This might also be called influence or control.
  • In politics, power is when one country makes another country do something. This kind of power might come from having a big army, or having a lot of money.
  • Power can mean electrical power. This kind of power usually comes from power plants or generators.
  • In statistics, the statistical power of a test is how likely the test is to say something is true when it is really false.
  • 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. This is also known as exponentiation.

The Chinese call it chi. The Japanese call it kiai.

[edit] See also