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
Article
28 sectionsContents
- Forms
- History
- Units of measure
- Scientific use
- Classical mechanics
- Chemistry<span class="anchor" id="Energy (chemistry)"></span>
- Biology<span class="anchor" id="Energy (biology)"></span>
- Humans
- Cell metabolism
- Earth sciences
- Cosmology<span class="anchor" id="Cosmology"></span>
- 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
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).
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.