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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

Vacuum energy print that page

The theory considers vacuum to implicitly have the same properties as a particle, such as spin or polarization in the case of light , energy , and so on. According to the theory, most of these properties cancel out on average leaving the vacuum empty in the literal sense of the word. One | 2011/5/14 22:03:57

Dark energy print that page


In physical cosmology , astronomy and celestial mechanics , dark energy is a hypothetical form of energy that permeates all of space and tends to increase the rate of expansion of the universe . [ 1 ] Dark energy is the most accepted theory to explain recent observations that the universe

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

Internal energy print that page

In thermodynamics , the internal energy is the total energy contained by a thermodynamic system . [ 1 ] It is the energy needed to create the system, but excludes the energy to displace the system's surroundings, any energy associated with a move as a whole, or due to external force | 2011/10/4 15:21:14

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

Mass–energy equivalence print that page


In physics , mass– energy equivalence is the concept that the mass of a body is a measure of its energy content. In this concept the total internal energy E of a body at rest is equal to the product of its rest mass m and a suitable conversion factor to transform from units of mass