Energy & Green Tech
In the quest for more efficient and sustainable energy solutions, a multi-university research team has reached a significant milestone in capacitor technology. Researchers from the University of Houston, Jackson State University ...
Apr 24, 2024
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Energy & Green Tech
The latest wearable devices, such as Samsung's Galaxy Ring and Apple's Vision Pro, are taking health care a step further and even enabling people to work virtually. Given the characteristics of wearable devices that require ...
Apr 19, 2024
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17
Engineering
Most people do not give the U.S. electric grid a second thought—we flip a switch, and the lights come on. Behind the scenes are thousands of power plants and utilities linked by millions of miles of transmission lines. ...
Apr 16, 2024
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57
Energy & Green Tech
Despite the recent cancellation of a next-generation US nuclear plant, backers of the carbon-free power source remain hopeful new projects will come on line by the end of the decade.
Apr 7, 2024
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74
Engineering
Wind power is a source of energy that is both affordable and renewable. However, decision-makers have been reluctant to invest in wind energy due to a perception that wind farms require a lot of land compared to electric ...
Apr 17, 2024
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148
Energy & Green Tech
A major approach to achieving net-zero carbon emissions relies on converting various parts of the economy, such as personal vehicles and heating, to run via electricity generated from renewable sources. But carbon cannot ...
May 1, 2024
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20
Hardware
Researchers at Tohoku University and the University of California, Santa Barbara, have unveiled a probabilistic computer prototype. Manufacturable with a near-future technology, the prototype combines a complementary metal-oxide ...
Apr 17, 2024
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57
Business
An electricity market analysis found adding battery storage to enhance grid reliability caused power generation markets to favor coal over natural gas.
Apr 11, 2024
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2
Electronics & Semiconductors
Pacemakers, defibrillators, radar technology and electric vehicles all need electrical components called capacitors that can store and release a lot of energy in a matter of a few microseconds. Researchers at the University ...
Apr 25, 2024
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43
Engineering
Today wirelessly connected devices are performing an expanding array of applications, such as monitoring the condition of engines and machinery and remote sensing in agricultural settings. Systems known as the "Internet of ...
Apr 9, 2024
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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.
This text uses material from Wikipedia, licensed under CC BY-SA
