The Energy Portal
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?
- Despite projections of producing four times as much power as it used in heating, the Riggatron fusion reactor was never built due to a lack of funding?
Marion King Hubbert
(1903–1989) was a geophysicist
who made several important contributions to geology
, most notably the Hubbert curve
and Hubbert peak theory
(or peak oil), with important political ramifications.
Born in Texas, Hubbert studied geology, mathematics, and physics at the University of Chicago. He pursued his Ph.D. while working for the Amerada Petroleum Company, then worked for the Shell Oil Company from 1943 until 1964. On leaving Shell he became a senior research geophysicist for the United States Geological Survey until retiring in 1976. Hubbert was also a professor at Stanford University and at UC Berkeley.
Hubbert is most well-known for his studies on the capacities of oil fields and natural gas reserves. He predicted that, for any given geographical area, the rate of petroleum production over time would resemble a bell curve. At the 1956 meeting of the American Petroleum Institute, Hubbert predicted that United States petroleum production would peak in the late 1960s or early 1970s. He became famous when his prediction came true in 1970.
In 1974, Hubbert projected that global oil production would peak in 1995 "if current trends continue". Various subsequent predictions have been made by others as trends have fluctuated in the intervening years. Hubbert's theory, and its implications for the world economy, remain controversial. Read more...
In the news
- 25 September 2019 – Economy of Poland
- Polish Energy Minister Krzysztof Tchórzewski announces the ruling Law and Justice party plans to pass new laws to enable more coal mines to be built. (Reuters via Euronews)
- 7 September 2019 – Nuclear program of Iran
- The Atomic Energy Organization of Iran announces it has activated the research and development of new uranium enrichment centrifuges. It is the third breach of the 2015 Joint Comprehensive Plan of Action agreement from which the United States withdrew last year, reimposing U.S. sanctions on Iran. Iranian President Hassan Rouhani has recently stated his country will reimplement the agreement only if the remaining parties also do so, giving them two extra months. (Deutsche Welle)
- 7 September 2019 –
- King Salman of Saudi Arabia replaces Minister of Energy Khalid al-Falih with his son Abdulaziz bin Salman by royal order. Earlier this month, al-Falih was replaced with Yasir Al-Rumayyan, head of the kingdom’s sovereign wealth fund and a close adviser to the crown prince, as chairman of Saudi Aramco. (Bloomberg)
- 5 September 2019 –
- Jo Johnson, British Prime Minister Boris Johnson's younger brother, resigns from his joint position as the minister of state for universities, science, research and innovation with the Department of Education and the Department for Business, Energy and Industrial Strategy. He says he has experienced "an unresolvable tension" in recent weeks in being "torn between family loyalty and the national interest". (NBC 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
WikiProjects connected with energy:
Other WikiProjects that may be of interest:
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.