Matches in DBpedia 2015-10 for { <http://dbpedia.org/resource/Energy> ?p ?o }
- Energy abstract "In physics, energy is a property of objects which can be transferred to other objects or converted into different forms, but cannot be created or destroyed. The "ability of a system to perform work" is a common description, but it is difficult to give one single comprehensive definition of energy because of its many forms. For instance, in SI units, energy is measured in joules, and one joule is defined "mechanically", being the energy transferred to an object by the mechanical work of moving it a distance of 1 metre against a force of 1 newton. However, there are many other definitions of energy, depending on the context, such as thermal energy, radiant energy, electromagnetic, nuclear, etc., where definitions are derived that are the most convenient.Common energy forms include the kinetic energy of a moving object, the radiant energy carried by light, the potential energy stored by an object's position in a force field (gravitational, electric or magnetic), elastic energy stored by stretching solid objects, chemical energy released when a fuel burns, and the thermal energy due to an object's temperature. All of the many forms of energy are convertible to other kinds of energy, and obey the law of conservation of energy which says that energy can be neither created nor be destroyed; however, it can change from one form to another.For "closed systems" with no external source or sink of energy, the first law of thermodynamics states that a system's energy is constant unless energy is transferred in or out by mechanical work or heat, and that no energy is lost in transfer. This means that it is impossible to create or destroy energy. The second law of thermodynamics states that all systems doing work always lose some energy as waste heat. This creates a limit to the amount of energy that can do work by a heating process, a limit called the available energy. Mechanical and other forms of energy can be transformed in the other direction into thermal energy without such limitations. The total energy of a system can be calculated by adding up all forms of energy in the system.Examples of energy transformation include generating electric energy from heat energy via a steam turbine, or lifting an object against gravity using electrical energy driving a crane motor. Lifting against gravity performs mechanical work on the object and stores gravitational potential energy In the object. If the object falls to ground, gravity does mechanical work on the object which transforms the potential energy in the gravitational field to the kinetic energy released as heat on impact with the ground. Our Sun transforms nuclear potential energy to other forms of energy; its total mass does not decrease due to that in itself (since it still contains the same total energy even if in different forms), but its mass does decrease when the energy escapes out to its surroundings, largely as radiant energy.Mass and energy are closely related. According to the theory of mass–energy equivalence, any object that has mass when stationary in a frame of reference (called rest mass) also has an equivalent amount of energy whose form is called rest energy in that frame, and any additional energy acquired by the object above that rest energy will increase an object's mass. For example, if you had a sensitive enough scale, you could measure an increase in mass after heating an object.Living organisms require available energy to stay alive, such as the energy humans get from food. Civilisation gets the energy it needs from energy resources such as fossil fuels. The processes of Earth's climate and ecosystem are driven by the radiant energy Earth receives from the sun and the geothermal energy contained within the earth.".
- Energy thumbnail Lightning_over_Oradea_Romania_zoom.jpg?width=300.
- Energy wikiPageExternalLink ch11.html.
- Energy wikiPageID "9649".
- Energy wikiPageLength "54216".
- Energy wikiPageOutDegree "327".
- Energy wikiPageRevisionID "683225340".
- Energy wikiPageWikiLink Activation_energy.
- Energy wikiPageWikiLink Adenosine_diphosphate.
- Energy wikiPageWikiLink Adenosine_triphosphate.
- Energy wikiPageWikiLink Advection.
- Energy wikiPageWikiLink Albert_Einstein.
- Energy wikiPageWikiLink Aristotle.
- Energy wikiPageWikiLink Arrhenius_equation.
- Energy wikiPageWikiLink Atmosphere.
- Energy wikiPageWikiLink Available_energy.
- Energy wikiPageWikiLink Basal_metabolic_rate.
- Energy wikiPageWikiLink Big_Bang.
- Energy wikiPageWikiLink Biology.
- Energy wikiPageWikiLink British_Thermal_Unit.
- Energy wikiPageWikiLink British_thermal_unit.
- Energy wikiPageWikiLink Caloric_theory.
- Energy wikiPageWikiLink Calorie.
- Energy wikiPageWikiLink Canonical_conjugate.
- Energy wikiPageWikiLink Carbohydrate.
- Energy wikiPageWikiLink Carbon_dioxide.
- Energy wikiPageWikiLink Carbon_fixation.
- Energy wikiPageWikiLink Carnots_theorem_(thermodynamics).
- Energy wikiPageWikiLink Casimir_effect.
- Energy wikiPageWikiLink Casimir_force.
- Energy wikiPageWikiLink Catabolism.
- Energy wikiPageWikiLink Category:Energy.
- Energy wikiPageWikiLink Category:State_functions.
- Energy wikiPageWikiLink Cell_(biology).
- Energy wikiPageWikiLink Centimetre_gram_second_system_of_units.
- Energy wikiPageWikiLink Centimetre–gram–second_system_of_units.
- Energy wikiPageWikiLink Chemical_energy.
- Energy wikiPageWikiLink Chemical_explosive.
- Energy wikiPageWikiLink Chemical_potential.
- Energy wikiPageWikiLink Chemical_reaction.
- Energy wikiPageWikiLink Chemistry.
- Energy wikiPageWikiLink Classical_field_theory.
- Energy wikiPageWikiLink Classical_mechanics.
- Energy wikiPageWikiLink Classical_physics.
- Energy wikiPageWikiLink Climate.
- Energy wikiPageWikiLink Closed_system.
- Energy wikiPageWikiLink Combustion.
- Energy wikiPageWikiLink Conjugate_variables.
- Energy wikiPageWikiLink Conservation_law.
- Energy wikiPageWikiLink Conservation_law_(physics).
- Energy wikiPageWikiLink Conservation_of_energy.
- Energy wikiPageWikiLink Conservative_force.
- Energy wikiPageWikiLink Conserved_quantity.
- Energy wikiPageWikiLink Continental_drift.
- Energy wikiPageWikiLink Coulomb_law.
- Energy wikiPageWikiLink Coulombs_law.
- Energy wikiPageWikiLink Degrees_of_freedom_(physics_and_chemistry).
- Energy wikiPageWikiLink Distribution_(mathematics).
- Energy wikiPageWikiLink Earth_science.
- Energy wikiPageWikiLink Earthquake.
- Energy wikiPageWikiLink Ecological_niche.
- Energy wikiPageWikiLink Ecology.
- Energy wikiPageWikiLink Ecosystem.
- Energy wikiPageWikiLink Elastic_energy.
- Energy wikiPageWikiLink Electric_charge.
- Energy wikiPageWikiLink Electric_energy.
- Energy wikiPageWikiLink Electric_field.
- Energy wikiPageWikiLink Electric_generator.
- Energy wikiPageWikiLink Electrical_energy.
- Energy wikiPageWikiLink Electromagnetic_energy.
- Energy wikiPageWikiLink Electron.
- Energy wikiPageWikiLink Electron_acceptor.
- Energy wikiPageWikiLink Electronvolt.
- Energy wikiPageWikiLink Endergonic.
- Energy wikiPageWikiLink Energeia.
- Energy wikiPageWikiLink Energy_conversion_efficiency.
- Energy wikiPageWikiLink Energy_industry.
- Energy wikiPageWikiLink Energy_level.
- Energy wikiPageWikiLink Energy_resource.
- Energy wikiPageWikiLink Energy_state.
- Energy wikiPageWikiLink Energy_transfer.
- Energy wikiPageWikiLink Energy_transformation.
- Energy wikiPageWikiLink Energy–momentum_4-vector.
- Energy wikiPageWikiLink Entropy.
- Energy wikiPageWikiLink Enzyme.
- Energy wikiPageWikiLink Equipartition_principle.
- Energy wikiPageWikiLink Equipartition_theorem.
- Energy wikiPageWikiLink Erg.
- Energy wikiPageWikiLink Exergonic.
- Energy wikiPageWikiLink Exergonic_process.
- Energy wikiPageWikiLink Exergy.
- Energy wikiPageWikiLink Field_(physics).
- Energy wikiPageWikiLink First_law_of_thermodynamics.
- Energy wikiPageWikiLink Fission_bomb.
- Energy wikiPageWikiLink Food_calorie.
- Energy wikiPageWikiLink Food_chain.
- Energy wikiPageWikiLink Food_energy.
- Energy wikiPageWikiLink Foot-pound_(energy).
- Energy wikiPageWikiLink Foot_pound.
- Energy wikiPageWikiLink Force.