See more Portal:Energy articles on AOD.

Powered by
TTSReader
Share this page on
Article provided by Wikipedia


( => ( => ( => Portal:Energy [pageid] => 6852819 ) =>
The Energy Portal
""Crystal energy.svg

Welcome to Wikipedia's energy "portal, your gateway to the subject of "energy and its effects on the world around us. This portal is aimed at educating you about energy and all its uses.

Main page   "Explore topics & categories   "Tasks & announcements


Page contents: IntroductionEnergy newsSelected articleSelected pictureSelected biographyDid you know?QuotationsRelated portalsWikiprojectsAssociated WikimediaHelp

edit  watch  

Introduction

Energy is a property of objects and systems of objects to act against a force (to do work), explored in branches of "physics such as "thermodynamics. Popularly the term is most often used in the context of energy as a public technology: "energy resources, their "consumption, "development, "depletion, and "conservation. Biologically, bodies rely on food for energy in the same sense as industry relies on fuels to continue functioning. Since economic activities such as manufacturing and transportation can be "energy intensive, "energy efficiency, "energy dependence, "energy security and price are key concerns. Increased awareness of the "effects of "global warming has led to global debate and action for the reduction of "greenhouse gases emissions; like many previous energy use patterns, it is changing not due to depletion or supply constraints but due to problems with waste, extraction, or geopolitical scenarios.

First, somehow there is a movement. There happened to be a burst of motion first. Motion implies and embraces energy, includes energy in itself. That first movement is a systematic one. The energy is the “ability of that system to perform work.” After that first movement we have the energy to play with. The universe is the result of the work systematically performed by that burst of motion. Motion can be transferred, transformed and converted into different forms. Whenever we see or sense a work done that means a visible energy. From here on radiation of energy, electromagnetic radiation and so on is easy to follow.

In the context of "natural science, energy can take several different forms: "thermal, chemical, "electrical, "radiant, "nuclear, etc. These are often grouped as being either "kinetic energy or "potential energy. Many of these forms can be readily transformed into another with the help of a device - from chemical energy to electrical energy using a "battery, for example. Most energy available for human use ultimately comes from the sun, which generates it with "nuclear fusion. The enormous potential for fusion and other basic nuclear reactions is expressed by the equation "E = mc2.

The concepts of energy and its transformations are useful in explaining natural processes on larger scales: "Meteorological phenomena like "wind, "rain, "lightning and "tornadoes all result from energy transformations brought about by "solar energy on the planet. "Life itself is critically dependent on biological energy transformations; organic "chemical bonds are constantly broken and made to make the exchange and transformation of energy possible. "Read more...


edit  watch  

Selected article

"Climate Change 2007, the fourth report of the "United Nations "Intergovernmental Panel on Climate Change (IPCC) to evaluate the risks of "global warming since 1990, is being published in sections throughout 2007. Prior to publishing, the report - which is the combined work of hundreds of experts - is reviewed by representatives from many of the world's governments.

Due to the accumulation of evidence, the report goes further than previous reports by stating that 'warming of the climate system is unequivocal'. It goes on to say that 'most of the observed increase in globally averaged temperatures since the mid-20th century is 'very likely' due to the observed increase in "anthropogenic "greenhouse gas concentrations'. "Fossil fuel use is given as the primary source of the increase in "atmospheric carbon dioxide, with the increase in "methane being very likely caused by a combination of "agricultural practices and fossil fuel use.

Based on an analysis of computer "climate models, the report states that "average surface temperatures will rise during this century, most likely between 1.1 to 4.3°C (5.2 to 11.5 °F), depending on the "mitigation actions taken. Excluding the effects of "ice sheet flow, they also predict a "sea level rise of 18 to 26 cm (7 to 23 inches), more "heat waves and more heavy "rain. An increase in areas affected by "droughts, in the intensity of "tropical cyclones and in extreme "high tides is also likely. The IPCC believe that stabilization of greenhouse gas concentrations is possible at a reasonable cost, with stabilization between 445 and 535 "ppm costing less than 3% of global "GDP. They do warn, however, that a 'large shift in the pattern of investment' is required. "Read more...


edit  watch  

Selected picture

""Windfarm (48).JPG

Photo credit: "BDS2006
"Wind farm is a group of "wind turbines in the same location used for production of electric power.


edit  watch  

Did you know?

""Compact-Fluorescent-Bulb.jpg
  • "Positive lightning bolts are typically six to ten times more powerful than normal lightning — and aircraft are not designed to withstand them?
  • "Dark energy is a hypothetical form of energy which permeates all of space?

edit  watch  

Selected biography

""{{{caption}}}
"Thomas Alva Edison (February 11, 1847 – October 18, 1931) was an "American "inventor and "businessman who developed many devices which greatly influenced life worldwide into the "21st century. Dubbed "The Wizard of "Menlo Park" by a newspaper reporter, he was one of the first inventors to apply the principles of "mass production to the process of "invention, and can therefore be credited with the creation of the first industrial research "laboratory.

Edison invented the first commercially practical "electric light bulb which, by "1879 would burn for hundreds of hours. He was able to sell the concept to homes and businesses by mass-producing them and creating a complete system for the generation and distribution of "electricity.

Edison patented an "electric distribution system in "1880, and in January "1882 he switched on the first steam generating power station at "Holborn Viaduct in "London, "UK. The "direct current (DC) supply system provided electricity supplies to street lamps and a number of private dwellings within a short distance of the station. The first investor-owned electric utility, "Pearl Street Station, "New York City, started generating on September 4, 1882, providing 110 "volts direct current to 59 customers in lower "Manhattan.

"Life magazine (USA), in a special double issue, placed Edison first in the list of the "100 Most Important People in the Last 1000 Years," noting that the "light bulb he promoted "lit up the world." He was ranked thirty-fifth on "Michael H. Hart's "list of the most influential figures in history. "Read more...


edit  watch  

Energy news


Wikinews on energy
"Renewable energy news


edit  watch  

Quotations



edit  watch  

Related portals

edit  watch  

WikiProjects

edit  watch  

Help

""Torchlight help icon.svg

Puzzled by energy?
Can't answer your question?
Don't understand the answer?


For further ideas, to leave a comment, or to learn how you can help improve and update this portal, see the "talk page.

edit  watch  

Associated Wikimedia

The following "Wikimedia Foundation sister projects provide more on this subject:

Wikibooks
Books

Commons
Media

Wikinews 
News

Wikiquote 
Quotations

Wikisource 
Texts

Wikiversity
Learning resources

Wikivoyage 
Travel guides

Wiktionary 
Definitions

Wikidata 
Database

Wikispecies 
Species

) )