ⓘ Energy



In physics, energy is the quantitative property that must be transferred to an object in order to perform work on, or to heat, the object. Energy is a conserved quantity; the law of conservation of energy states that energy can be converted in form, but not created or destroyed. The SI unit of energy is the joule, which is the energy transferred to an object by the work of moving it a distance of 1 metre against a force of 1 newton. Common forms of energy include the kinetic energy of a moving object, the potential energy stored by an objects position in a force field gravitational, electr ...


Index of energy articles

Activation energy - Alternative energy - Alternative energy indexes - American Museum of Science and Energy AMSE - Anisotropy energy - Atomic energy


Outline of energy

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. 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.


Brown energy

Brown energy may refer to: The term "brown energy" has been coined as energy produced from polluting sources as a contrast to green energy from renewable, non-polluting sources. This term is controversial, as it can cause offense by associating polluting/bad resources with a color that people self-identify as. The term "grey energy" or "gray energy" has been used instead, including by the United Nations.


Drakoo wave energy converter

The Drakoo WEC does not fall under any of the usual wave energy converter classifications: its working principle, based on a twin-chamber oscillating water column system, is to transform waves into a continuous water flow which drives a hydro turbine generator.


Driving factors

In energy monitoring and targeting, a driving factor is something recurrent and measurable whose variation explains variation in energy consumption. The term independent variable is sometimes used as a synonym. One of the most common driving factors is the weather, expressed usually as heating or cooling degree days. In energy-intensive processes, production throughputs would usually be used. For electrical circuits feeding outdoor lighting, the number of hours of darkness can be employed. For a borehole pump, the quantity of water delivered would be used; and so on. What these examples al ...


ⓘ Energy

  • conservation of energy states that energy can be converted in form, but not created or destroyed. The SI unit of energy is the joule, which is the energy transferred
  • In energy economics and ecological energetics, energy returned on energy invested EROEI or ERoEI or energy return on investment EROI is the ratio
  • Energy conservation is the effort made to reduce the consumption of energy by using less of an energy service. This can be achieved either by using energy
  • Office of Energy Efficiency and Renewable Energy EERE is an office within the United States Department of Energy Formed from other energy agencies after
  • Sustainable energy is the practice of using energy in a way that meets the needs of the present without compromising the ability of future generations
  • Efficient energy use, sometimes simply called energy efficiency, is the goal to reduce the amount of energy required to provide products and services
  • In physics, potential energy is the energy held by an object because of its position relative to other objects, stresses within itself, its electric charge
  • Energy density is the amount of energy stored in a given system or region of space per unit volume. Colloquially it may also be used for energy per unit
  • Energy development is the field of activities focused on obtaining sources of energy from natural resources. These activities include production of conventional

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