Power

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 true.
• 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.
• A life force, called chi by the Chinese and kiai by the Japanese.

Other pages

• Power plant