Power

Power has many meanings, all of which imply control or force. more...

Physical and mathematical sciences

Physics

• Power (physics) is the amount of work done or energy transferred per unit of time.

• Electric power generation is the process of converting any form of energy to electrical energy as in:
  • Power station
  • Nuclear power
  • Solar power
  • Wind power
  • Wave power
  • Tidal power
  • Geothermal power
  • Hydropower

Optics

Power has two meanings in optics:

• Power is used the same way as in other branches of physics
• A lens' optical power is the inverse of its focal length

Mathematics

• Exponentiation, for example 2³ is "two to the power of three"
• Statistical power, the probability that the test will reject a false null hypothesis
• Power of a method which, in the field of methodology, is inversely proportional to the generality of the method

Social sciences

• Power (sociology), the ability to impose one's will on others
  • Political power
  • Reserve power, a power that may be exercised by the head of state of a country in certain exceptional circumstances.
  • Power (international), the ability of national states to influence or control other states or regions
  • Power (communication), power in interpersonal communication
• Economic power has several meanings, including:
  • Purchasing power, the amount of goods and services a given amount of money can buy
  • Bargaining power or monopoly power, the ability to influence the setting of prices or wages

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