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Energy, in physics, the capacity for doing work. It may exist in potential, kinetic, thermal, electrical, chemical, nuclear, or various other forms. There are, moreover, heat and work—i.e., energy in the process of transfer from one body to another. Learn more about energy in this article.
In science, energy is the ability to do work or heat objects. It is a scalar physical quantity, which means it has magnitude, but no direction. Energy is conserved, which means it can change from one form to another, but isn’t created or destroyed.
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 is an abstract scalar quantity associated with motion (kinetic energy) or arrangement (potential energy). Energy is not measured, it is computed.
Energy Basics. An energy system converts primary energy resources like fossil fuels or wind into energy services. Energy services are what humans care about, like hot showers and cold beverages. There are energy losses each time we convert energy from one form to another.
Every time something gets warm, cools down, moves, grows, makes a sound or changes in any way, it uses energy. What about a piece of paper sitting on a desk not moving? The paper still has energy – it is just not using it. Science classifies energy into two categories – kinetic (moving) and potential (stored) energy.
The meaning of ENERGY is dynamic quality. How to use energy in a sentence. Synonym Discussion of Energy.
Discover the definition of energy in physics, other sciences, and engineering, with examples of different types of energy.
We know how it feels to be energetic—but what is energy exactly, and how we can investigate it? Learn about the theory of energy, the different macroscopic forms it takes, and how the forms of energy are tied together at the microscopic scale.
The basic unit of energy is the joule. One joule is the amount of work done when a force of 1 newton acts over a distance of 1 m; thus 1 J = 1 N-m. The newton is the amount of force required to accelerate a 1-kg mass by 1 m/sec 2, so the basic dimensions of the joule are kg m 2 s –2.