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In physics, energy (from Ancient Greek ἐνέργεια (enérgeia) 'activity') is the quantitative property that is transferred to a body or to a physical system, recognizable in the performance of work and in the form of heat and light.
- Energy (Disambiguation)
Science and philosophy. Energy (Aristotle), "actuality" in...
- Chemical Energy
Chemical energy is the energy of chemical substances that is...
- Body
A bubble of exhaled gas in water. In common usage and...
- Outline of Energy
The following outline is provided as an overview of and...
- Sound Energy
In physics, sound energy is a form of energy that can be...
- Plasma Lamp
A plasma lamp. Plasma lamps are a type of electrodeless...
- History
Stemming from the 1850s development of the first two laws of...
- Solar energy
Solar energy is radiant light and heat from the Sun that is...
- Potential energy
In physics, potential energy is the energy held by an object...
- Energy (Disambiguation)
Renewable energy (or green energy) is energy from renewable natural resources that are replenished on a human timescale. Using renewable energy technologies helps with climate change mitigation, energy security, and also has some economic benefits.
Learn about energy, the capacity for doing work, and its various forms, such as potential, kinetic, thermal, and nuclear. Explore how energy can be converted, measured, and conserved, and see examples of energy sources and applications.
- The Editors of Encyclopaedia Britannica
- What is energy?Energy is the capacity for doing work. It may exist in potential, kinetic, thermal, helectrical, chemical, nuclear, or other forms.
- What is the unit of measurement for energy?In the International System of Units (SI), energy is measured in joules. One joule is equal to the work done by a one-newton force acting over a on...
- Can energy be created?Energy can be neither created nor destroyed. It can only be changed from one form to another. This principle is known as the conservation of energy.
Energy can mean various things: In physics, energy is a property of matter and space. It can be transferred between objects. It can be converted in its form. It cannot be created or destroyed. In economics it may mean the ‘energy industry’, as in fuel or electric power distribution. Energy can be used to heat, move or illuminate.
