ENERGY

Energy

In physics, energy is one of the basic quantitative properties describing a physical system or object's state. Energy can be transformed among a number of forms that may each manifest and be measurable in differing ways. The law of conservation of energy states that the energy of a system can increase or decrease only by transferring it in or out of the system. The total energy of a system can be calculated by simple addition when it is composed of multiple non-interacting parts or has multiple distinct forms of energy. Common energy forms include the kinetic energy of a moving object, the radiant energy carried by light and other electromagnetic radiation, and ...

The above text is a snippet from Wikipedia: Energy

energy

Noun

1. The impetus behind all motion and all activity.
2. The capacity to do work.
3. A quantity that denotes the ability to do work and is measured in a unit dimensioned in mass × distance²/time² (ML²/T²) or the equivalent.
Units:
SI: joule (J), kilowatt-hour (kW·h)
CGS: erg (erg)
Customary: foot-pound-force, calorie, kilocalorie (i.e. dietary calories), BTU, liter-atmosphere, ton of TNT
4. An intangible, modifiable force (often characterized as either 'positive' or 'negative') believed to emanate from a person, place or thing and which is (or can be) preserved and transferred in human interactions; shared mood or group habit; a vibe, a feeling, an impression.

The above text is a snippet from Wiktionary: energy