News tagged with energy
Standing trees better than burning ones for carbon neutrality
The search for alternatives to fossil fuels has prompted growing interest in the use of wood, harvested directly from forests, as a carbon-neutral energy source.
52 minutes ago |
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Ultrafast laser helps to better understand high-temperature superconductors
Superconductivity, in which electric current flows without resistance, promises huge energy savings – from low-voltage electric grids with no transmission losses, superefficient motors and generators, ...
1 hour ago |
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Germany sets weekend record for solar power
(Phys.org) -- Solar power plants in Germany have set a new record. “Never before anywhere has a country produced as much photovoltaic electricity," said Norbert Allnoch, Germany’s director of the ...
Technology / Energy & Green Tech
May 30, 2012 |
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Carbon dioxide emissions reach record high
Emissions of heat-trapping carbon dioxide reached an all-time high last year, further reducing the chances that the world could avoid a dangerous rise in global average temperature by 2020, according to the International ...
May 29, 2012 |
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Bright future for solar power in space
Solar power gathered in space could be set to provide the renewable energy of the future thanks to innovative research being carried out by engineers at the University of Strathclyde, Glasgow.
Technology / Energy & Green Tech
May 30, 2012 |
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Grid realities cancel out some of wind power's carbon savings
(Phys.org) -- Wind energy lowers carbon emissions, but adding turbines to the current grid system does not eliminate emissions proportionally, according to a report by researchers at the Argonne National Laboratory.
Technology / Energy & Green Tech
May 30, 2012 |
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Graphene on boron nitride work may lead to breakthrough in microchip technology
(Phys.org) -- Graphene is the wonder material that could solve the problem of making ever faster computers and smaller mobile devices when current silicon microchip technology hits an inevitable wall. Graphene, ...
May 28, 2012 |
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Lower energy could lead to more biological imaging at LCLS
While SLAC's Linac Coherent Light Source was designed to push the limits as a high-energy X-ray laser, users' requests have led staff at the facility to successfully step it back to a lower minimum energy ...
May 30, 2012 |
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A way to reduce the Internet's energy drain
(Phys.org) -- Swiss researchers at EPFL have developed a device intended for monitoring and saving the energy consumed by large data centers. It was developed in collaboration with Credit Suisse, which has ...
Technology / Energy & Green Tech
May 28, 2012 |
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Voluntary groups can promote pro-environmental practice at small scale
New research by the University of Southampton has examined the role of voluntary organisations in promoting pro-environmental behaviour change. It points to evidence of success around small-scale, local initiatives, but questions ...
May 30, 2012 |
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Finnish researchers find explanation for sliding friction
Friction is a key phenomenon in applied physics, whose origin has been studied for centuries. Until now, it has been understood that mechanical wear-resistance and fluid lubrication affect friction, but the fundamental origin ...
May 29, 2012 |
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In nanorod crystal growth, nanoparticles seen as artificial atoms
In the growth of crystals, do nanoparticles act as "artificial atoms" forming molecular-type building blocks that can assemble into complex structures? This is the contention of a major but controversial theory ...
May 24, 2012 |
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Company makes power bills more understandable, suggests how to save energy
It's often said that knowledge is power. Knowledge about power is what drives Opower, a 5-year-old online customer engagement platform.
Technology / Energy & Green Tech
May 29, 2012 |
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High-speed method to aid search for solar energy storage catalysts
Eons ago, nature solved the problem of converting solar energy to fuels by inventing the process of photosynthesis.
May 25, 2012 |
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Sci-fi no longer, NREL engineers smart homes
Thanks to TV shows such as The Jetsons and Star Trek, many Americans grew up dreaming that homes of the future would be equipped with fantastic high-tech features. From automatic food dispensers to sliding do ...
Technology / Energy & Green Tech
May 28, 2012 |
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Energy
In physics, energy (from the Greek ἐνέργεια - energeia, "activity, operation", from ἐνεργός - energos, "active, working") is a scalar physical quantity that describes the amount of work that can be performed by a force, an attribute of objects and systems that is subject to a conservation law. Different forms of energy include kinetic, potential, thermal, gravitational, sound, light, elastic, and electromagnetic energy. The forms of energy are often named after a related force.
Any form of energy can be transformed into another form, but the total energy always remains the same. This principle, the conservation of energy, was first postulated in the early 19th century, and applies to any isolated system. According to Noether's theorem, the conservation of energy is a consequence of the fact that the laws of physics do not change over time.
Although the total energy of a system does not change with time, its value may depend on the frame of reference. For example, a seated passenger in a moving airplane has zero kinetic energy relative to the airplane, but non-zero kinetic energy relative to the Earth.
For more information about Energy, read the full article at
Wikipedia.
This text uses material from Wikipedia and is available under the GNU Free Documentation License.
