Every computing system, biological or synthetic, from cells to brains to laptops, has a cost. This isn't the price, which is easy to discern, but an energy cost connected to the work required to run a program and the heat ...
General Physics
8 hours ago
0
84
Coal phase-out is necessary to solve climate change, but can have negative impacts on workers and local communities dependent on coal for their livelihoods. Researchers at Chalmers University of Technology in Sweden and Central ...
Environment
13 hours ago
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50
Slow electrons are used in cancer therapy as well as in microelectronics. It is very hard to observe how they behave in solids. But scientists at TU Wien have made this possible.
Condensed Matter
13 hours ago
0
0
Fifty countries are meeting in France on Tuesday to discuss the lack of access to clean cooking methods worldwide which causes millions of deaths every year and fuels global warming.
Environment
16 hours ago
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32
In a bid to address the growing demand for renewable energy, a team of scientists has turned to an unlikely source—the humble breadfruit. A recent study published in the Journal of Bioresources and Bioproducts has shed ...
Biotechnology
May 10, 2024
0
11
In the era of big data, signal processing faces significant challenges in terms of capacity and energy consumption due to the torrent of data to process. With over 90% of data transmitted through light, optical signal processing ...
Optics & Photonics
May 10, 2024
0
15
To meet the demands of next-generation ultrahigh-definition displays, the organic light-emitting diodes (OLED) industry is actively pursuing the development of narrowband organic light-emitting materials. Within this effort, ...
Optics & Photonics
May 10, 2024
0
1
Mantis shrimp are small creatures known for their superlatives. Their eyes have 12 to 16 different color receptors versus our own three, and can detect the polarization of light. Their punches are famously fast, accelerating ...
Plants & Animals
May 10, 2024
0
41
A study published in Nature Astronomy and conducted by Guo Jianheng from the Yunnan Observatories of the Chinese Academy of Sciences offers a perspective on the violent atmospheric escape processes of low-mass exoplanets, ...
Planetary Sciences
May 10, 2024
0
10
In a study published in the journal National Science Review, a material synthesized by Dr. Shen Yu was used to introduce hydroperoxide into the synthesis system of titanium silicates.
Analytical Chemistry
May 10, 2024
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1
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.
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