Energy & Green Tech
As the climate crisis looms, scientists are racing to find solutions to common clean energy problems, including solar energy storage. Solar energy is one of the best renewable resources we have, but it has challenges that ...
Jun 24, 2022
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123
Energy & Green Tech
Scientists led by an Oregon State University researcher have developed a new electrolyte that raises the efficiency of the zinc metal anode in zinc batteries to nearly 100%, a breakthrough on the way to an alternative to ...
Mar 27, 2023
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159
Energy & Green Tech
During a power outage or after a disaster, it is hard to beat the simplicity of a diesel generator. Just supply fuel and start it up—so easy, anyone could do it. Renewable microgrids, on the other hand, are not so simple, ...
Sep 30, 2022
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119
Energy & Green Tech
With lithium prices over five times higher than they were a year ago, researchers from Skoltech and Lomonosov Moscow State University have developed a material for sodium-ion batteries that offer an alternative to the increasingly ...
Aug 1, 2022
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688
Electronics & Semiconductors
Researchers at the University of Massachusetts Amherst recently announced that they have figured out how to engineer a biofilm that harvests the energy in evaporation and converts it to electricity. This biofilm, which was ...
Aug 2, 2022
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265
Electronics & Semiconductors
One month after announcing a ferroelectric semiconductor at the nanoscale thinness required for modern computing components, a team at the University of Michigan has demonstrated a reconfigurable transistor using that material.
Mar 8, 2023
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67
Energy & Green Tech
Solar energy is the cheapest and most accessible form of energy. Now, it promises to be more efficient than ever. Scientists from a Chinese solar technology company have developed a new type of solar cell that could be a ...
May 9, 2023
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108
Energy & Green Tech
Researchers at Texas A&M University have discovered a 1,000% difference in the storage capacity of metal-free, water-based battery electrodes.
Apr 3, 2023
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534
Engineering
A team of physicists and material scientists at the University of Colorado has developed a way to better insulate double-paned glass used for windows by adding a transparent aerogel. In their paper published in the journal ...
Mar 17, 2023 report
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Electronics & Semiconductors
UNSW researchers have made a major breakthrough in renewable energy technology by producing electricity from so-called "night-time" solar power.
May 17, 2022
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2340
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
