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Outline of energy

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The following outline is provided as an overview of and topical guide to energy:

Energy – in physics, this is an indirectly observed quantity often understood as the ability of a physical system to do work on other physical systems.[1][2] Since work is defined as a force acting through a distance (a length of space), energy is always equivalent to the ability to exert force (a pull or a push) against an object that is moving along a definite path of certain length.

Forms of energy

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Measurement

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Units

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List of common units for energy. Official or common symbol in brackets after name and exact or approximate value of unit in joule in brackets after description.

SI unit

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  • Joule (J) – the SI-unit for energy. Also called newton meter, watt second, or coulomb volt.

Other metric units

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  • Kilowatt-hour (kW·h) – corresponds to one kilowatt of power being used over a period of one hour (3.6 MJ).
  • Calorie (cal) – equal to the energy need to raise the temperature of one gram of water by one degree Celsius (~4.184 J).
  • Erg (erg) – unit of energy and mechanical work in the centimetre-gram-second (CGS) system of units (10−7 J).

Imperial or US Customary units

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  • British thermal unit (BTU) – equal to the energy need to raise the temperature of one pound of water by one degree Fahrenheit (~1055 J).
  • Therm (thm) – unit of heat energy. In the US gas industry it is defined as exactly 100,000 BTU59 °F. It is approximately the heat equivalent of burning 100 cubic feet (2.8 m3) of natural gas (~105.5 MJ).
  • Quad – unit of energy equal to 1015 (a short-scale quadrillion) BTU.
  • Foot-pound (ft·lbf or ft·lbf) – unit of mechanical work, or energy, although in scientific fields one commonly uses joule (~1.356 J).

Other units

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  • Electronvolt (eV) – the amount of energy gained by a single unbound electron when it falls through an electrostatic potential difference of one volt (~1.60 × 10−19 J).
  • Planck energy (EP) – natural unit of energy common in particle physics (~1.96×109 J).
  • Barrel of oil equivalent (BOE) – energy unit equal to the energy released when burning one barrel (159 litres) of oil (~6.12 GJ).
  • Tonne of oil equivalent (toe) – energy unit equal to the energy released when burning one tonne of oil (~42 GJ).
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Energy industry

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Energy industry

Energy infrastructure

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See especially Category:Electric power and Category:Fuels for a large number of conventional energy related topics.

Energy applications

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History of energy

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History of energy

Physics of energy

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Allegorical and esoteric

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  • Energeticism, theory that there is no matter and everything is composed of energy
  • Energy (esotericism), invoked by spiritualists for alternative modes of healing the human body as well as a spirit that permeates all of reality.
  • Orgone, Wilhelm Reich discovered this energy and tried to use it to cure various physical ailments and control the weather.
  • Bioenergetic analysis, body-oriented Reichian psychotherapy
  • Qi, a concept from Oriental medicine that is sometimes translated as "energy" in the West.
  • Vitalism, often referred to as "energy"
  • Cold fusion, nuclear fusion at conditions close to room temperature.
  • Bubble fusion, also known as Sonofusion, energy from acoustic collapse of bubbles.
  • Water-fuelled car, powering a car using water as fuel.

Politics

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Energy issues

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Energy policies and use – national and international

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International

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Regional and national

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Economics

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Energy economics

Energy companies

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Non-profit organizations

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Industry associations

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  • OPEC – Organization of Petroleum-exporting Countries
  • IEA – International Energy Agency
  • CAPP – Canadian Association of Petroleum Producers
  • World LP Gas Association – WLPGA

Innovators

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Lists

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See also

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References

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  1. ^ "Retrieved on 2010-Dec-05". Faculty.clintoncc.suny.edu. Archived from the original on 2007-12-13. Retrieved 2010-12-12.
  2. ^ "Retrieved on 2010-Dec-05" (PDF). Archived (PDF) from the original on 2011-04-26. Retrieved 2010-12-12.
  3. ^ Jain, Mahesh C. (2009). "Fundamental forces and laws: a brief review". Textbook Of Engineering Physics, Part 1. PHI Learning Pvt. Ltd. p. 10. ISBN 9788120338623.
  4. ^ McCall, Robert P. (2010). "Energy, Work and Metabolism". Physics of the Human Body. JHU Press. p. 74. ISBN 978-0-8018-9455-8.
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