Software
Researchers at the Department of Energy's Oak Ridge National Laboratory have developed the first additive manufacturing slicing computer application to simultaneously speed and simplify digital conversion of accurate, large-format ...
Jul 1, 2024
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14
Business
A bit of retail therapy can feel like harmless fun. Yet getting a great deal on a new shirt or pair of shoes may come with a hidden price tag: greenhouse gas emissions, resource depletion, and the mistreatment of workers ...
Jul 1, 2024
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1
Energy & Green Tech
High energy density is a crucial direction for future battery development. Lithium-sulfur (Li-S) batteries, with their high theoretical energy density, have garnered significant attention. However, the slow solid-liquid-solid ...
Jun 28, 2024
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7
Energy & Green Tech
Researchers at Princeton and UCLA have developed a passive mechanism to cool buildings in the summer and warm them in the winter.
Jun 27, 2024
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54
Energy & Green Tech
Norway wastes huge amounts of energy. Surplus heat produced by industry is hardly exploited at all.
Jun 27, 2024
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14
Energy & Green Tech
The desert city of Sedona, Arizona, is home to less than 10,000 people but welcomes nearly 3 million visitors every year. The city knows it needs a big boost to its electric vehicle (EV) charging infrastructure to support ...
Jun 27, 2024
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1
Engineering
In order to convert sunlight into electricity or other forms of energy as efficiently as possible, the very first step is an efficient light-harvesting system. Ideally, this should be panchromatic, i.e. absorb the entire ...
Jun 26, 2024
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38
Computer Sciences
Computers have come so far in terms of their power and potential, rivaling and even eclipsing human brains in their ability to store and crunch data, make predictions and communicate. But there is one domain where human brains ...
Jun 26, 2024
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46
Energy & Green Tech
Coal will no longer be burned for power in Australia within 14 years. To replace it will require faster deployment of solar and wind, storage, new transmission lines and some firming gas capacity.
Jun 26, 2024
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10
Energy & Green Tech
Decarbonization requires radical transformation of the U.S. energy sector, and nuclear energy could be at the center of that transformation. It already provides a fifth of the nation's electricity, and new designs suggest ...
Jun 26, 2024
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5
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
