Energy
In science, energy is a concept that relates to the capacity of matter to perform work as the result of its motion or its position in relation to forces acting on it.[1] The term "energy" is widely used in various spheres of life and many meanings are often ascribed to it.[2] In general terms, the word is useful to explain changes that characterize natural processes and phenomena.
Science and technology
- History of Energy, how the concept was developed over time
- Energy (physics), the amount of work a physical system can do on another
- Law of conservation of energy, a physical law in natural sciences governing energy
- Energy forms, the forms in which energy can be defined
- Activation energy explains the differences in the speeds of various chemical reactions
- Energy transformation, relating to energy's changes from one form to another
- Energy (chemistry), the potential for substances to undergo transformations or transform other substances
- Energy (biology), the potential of organisms to undergo or cause a change in their form or function
- Energy (Earth science), the potential of various constituents of the planet Earth to influence one another
- Energy (cosmology), energy transformations in the universe beyond the planet Earth
- Potential energy, the form of energy that is due to position of an object
- Kinetic energy, the form of energy as a consequence of the motion of an object or its constituents
- Mechanical energy, the potential energy and kinetic energy present in the components of a mechanical system.
- Binding energy, a concept explaining how the constituents of atoms or molecules are bound together
- Bond energy, a measure of the strength of a chemical bond
- Nuclear energy, energy that is the consequence of decomposition of an atomic nucleus
- Gibbs free energy, a related concept in chemical thermodynamics that incorporates entropy considerations too
- Helmholtz free energy, a thermodynamic potential that measures the "useful" work obtainable from a closed thermodynamic system at a constant temperature, useful for studying explosive chemical reactions
- Elastic energy, which causes or is released by the elastic distortion of a solid or a fluid
- Interaction energy, the contribution to the total energy that is a result of interaction between the objects being considered
- Internal energy, potential for a closed thermodynamic system held at constant entropy
- Negative energy
- Orders of magnitude (energy)
- Units of energy, joules, ergs, calories, etc.
- Dark energy, used to explain some cosmological phenomena
- Planck energy, 1.22 × 10<sup>19</sup> GeV (billion electron volts)
- Energy quality, empirical experience of the characteristics of different energy forms as they flow and transform
- Energy density, amount of energy stored in a given system or region of space per unit volume, or per unit mass
- Energy flow, flow of energy in an ecosystem through food chains
- Energetics, the scientific study of energy flows under transformation
- Stress-energy tensor, the density and flux of energy and momentum in space-time; the source of the gravitational field in general relativity
- Energy (signal processing)
- Food energy, energy in food that is available through digestion
Society
- Energy (social studies), applications and energy related activities in society
- World energy resources and consumption
- List of energy resources, substances like fuels, petroleum products and electricity
- Energy crisis, the need to conserve energy resources
- Energy development, development of energy resources
- Future energy development
- Embodied energy, the sum total of energy expended to deliver a good or service as it travels through the economy
- Energy conservation, tips for conserving energy resources
- Energy economics, as the foundation of other relationships
- Energy industry, that supplies of fuel for consumers
- Energy policy, government policies and plans for energy supply
- Energy storage, methods commonly used to store energy resources for later use
Psychological and spiritual
- Energy (spirituality), invoked by spiritualists for alternative modes of healing the human body
- Energy (psychological), a psychological term used to describe the states of human mind
- Vitalism, often referred to as "energy"
Music
Radio
- KNGY, Energy 92.7 (San Francisco, California) - Pure Dance
- KNRJ, Energy 92.7 & 101.1 (Phoenix, Arizona) - The Beat of Arizona
- KBZD, Energy 99.7 (Amarillo, Texas) - The Music That Keeps You Movin
- NRJ Radio, Radio network based in Paris, France
- WNRJ, Energy 106.1 (Poquoson, Virginia) - Music That Makes You Move
See also
External links
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Citations
- [1] Microsoft ® Encarta ® 2006. © 1993-2005 Microsoft Corporation.
- [2] http://www.wordseek.info/word/all/energy.html