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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

wikipedia.org | 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

Energy recovery print that page

stream or waste stream which is transferred from the system to its surroundings. Some of the energy in that flow of material (often gasesous or liquid ) may be transferred to the make-up or input material flow. This input mass flow often comes from the system's surroundings, which,

wikipedia.org | 2011/4/18 17:34:23

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

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

wikipedia.org | 2011/7/17 21:15:23

Energy development print that page


Technologically advanced societies have become increasingly dependent on external energy sources for transportation , the production of many manufactured goods, and the delivery of energy services. This energy allows people who can afford the cost to live under otherwise unfavorable climatic

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

wikipedia.org | 2011/9/19 23:32:51

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

wikipedia.org | 2011/10/4 15:21:14

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