Wikipedia Portalsclose

Results 1 - 10 of 5910 for  Wikipedia / Energy / Wikipedia    (3565152 articles)

Energy print that page


In physics , energy ( Ancient Greek : ἐνέργεια   energeia  "activity, operation" [ 1 ] ) is an indirectly observed quantity. It is often understood as the ability a physical system has to do work on other physical systems. [ 2 ] [ 3 ] Since work is defined as a force acting

Z Energy print that page

Following the change in ownership, Z Energy has employed more New Zealanders for roles that were previously outsourced overseas including: IT [ 4 ] , finance and call centre services [ 5 ] . Initially, the company was called Greenstone and the service station branding remained as Shell. After | 2011/9/12 9:32:03

Potential energy print that page


In physics , potential energy is the energy stored in a body or in a system due to its position in a force field or due to its configuration. [ 1 ] The SI unit of measure for energy and work is the Joule (symbol J). The term "potential energy " was coined by the 19th century Scottish

Radiant energy print that page


The term "radiant energy " is most commonly used in the fields of radiometry , solar energy , heating and lighting , but is also sometimes used in other fields (such as telecommunications ). In modern applications involving transmission of power from one location to another, "radiant energy

Energy medicine print that page

NCCAM divides the overall approach to the practice of energy medicine" into two general categories: putative , therapies predicated on theorized forms of energy " (that is, forms of energy of which scientific investigation has not confirmed the existence) veritable , therapies which | 2011/7/9 4:35:53

Kinetic energy print that page


The kinetic energy of an object is the energy which it possesses due to its motion . [ 1 ] It is defined as the work needed to accelerate a body of a given mass from rest to its stated velocity . Having gained this energy during its acceleration , the body maintains this kinetic energy

Fermi energy print that page

The Fermi energy is a concept in quantum mechanics usually referring to the energy of the highest occupied quantum state in a system of fermions at absolute zero temperature . Confusingly, the term "Fermi energy " is often used to describe a different but closely-related concept, the | 2011/7/17 21:15:23

Energy density print that page

For fuels, the energy per unit volume is sometimes a useful parameter. Comparing, for example, the effectiveness of hydrogen fuel to gasoline , hydrogen has a higher specific energy than gasoline does, but, even in liquid form, a much lower energy density. Energy per unit volume has | 2011/9/19 23:32:51

Binding energy print that page

In general, binding energy represents the mechanical work which must be done against the forces which hold an object together, disassembling the object into component parts separated by sufficient distance that further separation requires negligible additional work. At the atomic level | 2011/8/30 10:45:39

Energy level print that page

A quantum mechanical system or particle that is bound -- that is, confined spatially—can only take on certain discrete values of energy . This contrasts with classical particles, which can have any energy . These discrete values are called energy levels . The term is commonly used for | 2011/9/13 16:48:37