Energy & Green Tech
Plans to revive an old coal-fired power station using bioenergy are being considered in the Hunter region of New South Wales. Similar plans for the station have previously not gone ahead. As we grapple with decarbonization, ...
May 1, 2024
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24
Engineering
The industrial production of steel, concrete, or glass requires more than 20% of Germany's total energy consumption. Up to now, 90% of the fuels used for these processes have been of fossil nature.
Apr 24, 2024
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3
Engineering
The Compression-Absorption Cascade Refrigeration Cycle (CACRC) system, merging Vapor-Compression Refrigeration (VCR) with Absorption Refrigeration Cycle (ARC), presents a promising answer to the pressing energy demands and ...
Apr 8, 2024
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3
Energy & Green Tech
Microsoft and Canada's Brookfield Asset Management have struck an agreement for the development of renewable energy that could make one of the biggest corporate purchases of green energy to date, the companies said on Tuesday.
May 2, 2024
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14
Energy & Green Tech
China has extended its manufacturing domination to clean energy industries in recent years, alongside a global push for climate change action, but that is starting to worry the United States, Europe and others.
Apr 5, 2024
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1
Energy & Green Tech
The electrode sheet of a thermoelectric device consists of ionic hydrogel, which is sandwiched between the electrodes to form, and the Prussian blue on the electrode undergoes a redox reaction to improve the energy density ...
Apr 22, 2024
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19
Energy & Green Tech
Ninety miles west of Chicago, the corn and soybean fields stretch to the sky, and dreams of the clean energy future dangle—just out of reach.
Apr 22, 2024
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1
Energy & Green Tech
The future is looking sunny for Kennedy Airport's long-term parking lot No. 9. Construction began on April 23 on a solar array meant to cover some 21 acres of the lot while maintaining the car park beneath.
Apr 24, 2024
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Electric potential energy (also known as "electrostatic potential energy") is a potential energy associated with the conservative Coulomb forces within a defined system of point charges. The term "electrostatic potential energy" is preferred here because it seems less likely to be misunderstood. The reference zero is usually taken to be a state in which the individual point charges are very well separated ("are at infinite separation") and are at rest. :§25-1 The electrostatic potential energy of the system (UE), relative to this zero, is equal to the total work W that must be done by a hypothetical external agent in order to bring the charges slowly, one by one, from infinite separation to the desired system configuration:
In this process the external agent is deemed to provide or absorb any relevant work, and the point charge being slowly moved gains no kinetic energy.
Sometimes people refer to the potential energy of a charge in an electrostatic field. This actually refers to the potential energy of the system containing the charge and the other charges that created the electrostatic field.:§25-1
To calculate the work required to bring a point charge into the vicinity of other (stationary) point charges, it is sufficient to know only (a) the total field generated by the other charges and (b) the charge of the point charge being moved. The field due to the charge being moved and the values of the other charges do not need to be known. Nonetheless, in many circumstances it is mathematically easier to add up all the pairwise potential energies (as below).
It is important to understand that electrostatics is a 18th-19th-century theory of hypothetical entities called "point charges". Electrostatics is categorically not a complete theory of the charged physical particles that make up the physical world, and are subject to the Heisenberg uncertainty principle and other laws of quantum mechanics.
This text uses material from Wikipedia, licensed under CC BY-SA
