energy

Energy () is the quantitative property that is transferred to a body or to a physical system, recognizable in the capacity to do work and in the form of heat and light. 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 unit of measurement for energy in the International System of Units (SI) is the joule (J).

AI overview

Energy is a property that can be transferred between objects and systems, showing up as the ability to do work or as heat and light. It matters because energy cannot be created or destroyed—only converted from one form to another—which is a fundamental rule governing how the physical world operates.

AI-generated from the Wikipedia summary — may contain errors.

Key facts

Physical quantity.name: Energy
Physical quantity.image: Plasma globe 60th.jpg
Physical quantity.caption: A plasma globe using electrical energy to create plasma, light, heat, movement, and a faint sound
Physical quantity.unit: joule (J)
Physical quantity.otherunits: kWh, BTU, calorie, eV, erg, foot-pound
Physical quantity.symbols: E
Physical quantity.baseunits: J = kg⋅m2⋅s−2
Physical quantity.dimension: M L2 T−2
Physical quantity.extensive: yes
Physical quantity.conserved: yes
Physical quantity.image_upright: 1.15

via Wikipedia infobox

Wikidata facts

Instance of: physical quantity
Subclass of: extensive quantity
Part of: universe
Image: Electric power transmission.jpg
Has use: energy technology

Show 14 more facts

Commons category: Energy
topic's main category: Category:Energy (physics)
has characteristic: form of energy
equivalent class: schema.org/Energy
on focus list of Wikimedia project: Wikipedia:Vital articles/Level/4
maintained by WikiProject: WikiProject Energy
topic has template: Template:Energy footer
different from: power
Stack Exchange tag: worldbuilding.stackexchange.com/tags/energy
exact match: purl.obolibrary.org/obo/ENVO_2000015
social media followers: 227967
studied by: energetics
hashtag: energy
has cause: energy source

Sources (6)

via Wikidata · CC0

~45 min read

Encyclopedic overview

28 sections

Contents

Forms
History
Units of measure
Scientific use
Classical mechanics
Chemistry
Biology
Humans
Cell metabolism
Earth sciences
Cosmology
Quantum mechanics
Relativity
Transformation
Conservation of energy and mass in transformation
Reversible and non-reversible transformations
Conservation of energy
Energy transfer
Closed systems
Open systems
Thermodynamics
Internal energy
First law of thermodynamics
Equipartition of energy
See also
Notes
References
External links

Forms of energy include the kinetic energy of a moving object, the potential energy stored by an object (for instance due to its position in a field), the elastic energy stored in a solid object, chemical energy associated with chemical reactions, the radiant energy carried by electromagnetic radiation, the internal energy contained within a thermodynamic system, and rest energy associated with an object's rest mass. These are not mutually exclusive.

Excerpted from Wikipedia’s “energy” article, available under the CC BY-SA 4.0 licence.