Energy & Green Tech
Mounting evidence suggests the western United States is now in its worst megadrought in at least 1,200 years. Groundwater supplies are being overpumped in many places, and the dryness, wildfires and shrinking water supplies ...
Mar 1, 2022
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723
Engineering
Engineers at MIT and the National Renewable Energy Laboratory (NREL) have designed a heat engine with no moving parts. Their new demonstrations show that it converts heat to electricity with over 40 percent efficiency—a ...
Apr 13, 2022
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8184
Energy & Green Tech
A nuclear power plant produces 8000 times more power than fossil fuels and is environmentally friendly, but when accidents do occur, they have major repercussions, such as the 1986 Chernobyl disaster. Nearly 100 people died ...
Oct 5, 2022
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384
Energy & Green Tech
Australia touted a world-first project Tuesday that could help make the country a "renewable energy superpower" by shifting huge volumes of solar electricity under the sea to Singapore.
Oct 18, 2022
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53
Energy & Green Tech
Using a unique hydrogel, scientists in Saudi Arabia created a solar-driven system that successfully grows spinach by using water drawn from the air while producing electricity. The proof-of-concept design, described March ...
Mar 1, 2022
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368
Energy & Green Tech
Lithium-ion batteries are currently the preferred technology to power electric vehicles, but they're too expensive for long-duration grid-scale energy storage systems, and lithium itself is becoming more challenging to access.
May 31, 2022
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512
Engineering
As important as the internal combustion engine has been for societal progress, it is also a major contributor to pollution that damages human health and carbon emissions that help drive the climate crisis. Close to 30% of ...
Aug 16, 2022
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262
Engineering
Researchers from the University of Glasgow have developed a new type of heat pump, a flexible heat pump technology, which could help households save on their energy bills and contribute towards net-zero emissions goals.
Aug 1, 2022
5
1929
Consumer & Gadgets
Tech firms have spent years hawking the idea of a connected home filled with "smart" devices that help smooth daily domestic lives—and this year's CES gadget show in Las Vegas is no different.
Jan 6, 2023
2
45
Energy & Green Tech
"It is the first domestic commercial unit with zero direct and indirect emissions. Currently, there are already units that use the same technology as ours, which is aerothermal energy, but they do not use a natural fluid ...
Apr 6, 2022
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135
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
