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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