The Energy Portal
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Welcome to Wikipedia's Energy portal, your gateway to energy. This portal is aimed at giving you access to all energy related topics in all of its forms.
is the source of energy for most of life on Earth. As a star, the Sun is heated to high temperatures by the conversion of nuclear binding energy
due to the fusion of hydrogen in its core. This energy is ultimately transferred
(released) into space mainly in the form of radiant (light) energy
In physics, energy is the quantitative property that must be transferred to an object in order to perform work on, or to heat, the object. Energy is a conserved quantity; the law of conservation of energy states that energy can be converted in form, but not created or destroyed. The SI unit of energy is the joule, which is the energy transferred to an object by the work of moving it a distance of 1 metre against a force of 1 newton.
Common forms of energy include the kinetic energy of a moving object, the potential energy stored by an object's position in a force field (gravitational, electric or magnetic), the elastic energy stored by stretching solid objects, the chemical energy released when a fuel burns, the radiant energy carried by light, and the thermal energy due to an object's temperature.
Mass and energy are closely related. Due to mass–energy equivalence, any object that has mass when stationary (called rest mass) also has an equivalent amount of energy whose form is called rest energy, and any additional energy (of any form) acquired by the object above that rest energy will increase the object's total mass just as it increases its total energy. For example, after heating an object, its increase in energy could be measured as a small increase in mass, with a sensitive enough scale.
Living organisms require energy to stay alive, such as the energy humans get from food. Human civilization requires energy to function, which it gets from energy resources such as fossil fuels, nuclear fuel, or renewable energy. The processes of Earth's climate and ecosystem are driven by the radiant energy Earth receives from the sun and the geothermal energy contained within the earth.
Did you know?
- Golar Spirit (pictured) is the world's first floating storage and regasification vessel converted from a LNG carrier?
- The scientific-technical journal Oil Shale is the only journal in the world that focuses on oil shale as a main subject?
Albert Arnold "Al" Gore, Jr.
(born 31 March 1948) is an American politician
, and environmentalist
. From 1993 to 2001, he was the 45th Vice President of the United States
, serving while Bill Clinton
was President. In the 2000 election
Gore won the popular vote
but not the electoral college
Gore lectures widely on the topic of global warming and has given his keynote presentation at least 1,000 times across the world. In 2006 he starred in the Academy Award-winning documentary An Inconvenient Truth, discussing global warming and the environment, based on his presentation.
Gore was one of the first politicians to grasp the seriousness of climate change and to call for a reduction in greenhouse gas emissions. He held the first congressional hearings on the subject in the late 1970s. Gore pushed strongly for the passage of the Kyoto Treaty in the United States during the late 1990s.
In 2007 Al Gore and Richard Branson announced the Virgin Earth Challenge, offering a $25 million prize for the first viable design which results in the removal of atmospheric greenhouse gases. He is also one of the backers of the Live Earth concerts to promote action on climate change. Read more...
In the news
- "For those who want some proof that physicists are human, the proof is in the idiocy of all the different units which they use for measuring energy." – Richard Feynman
- "The energy produced by breaking down the atom is a very poor kind of thing. Anyone who expects a source of power from the transformations of these atoms is taking moonshine." – Ernest Rutherford
- "If you take a bale of hay and tie it to the tail of a mule and then strike a match and set the bale of hay on fire, and if you then compare the energy expended shortly thereafter by the mule with the energy expended by yourself in the striking of the match, you will understand the concept of amplification." – William Shockley
- "It is easier to split an atom than to break a prejudice." – Albert Einstein
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