Engineering
Integrating a super moisture-absorbent gel with light-active materials, researchers in Singapore have developed a humidity digester to dry the ambient air while generating energy. The method, presented November 20 in the ...
Nov 20, 2019
0
143
Energy & Green Tech
Energy storage company Highview Power has announced its intention to build a cryogenic energy storage facility in the north of England—a first for the U.K. The project calls for converting a decommissioned thermal power ...
Telecom
When WiFi was designed, it was intended for high-speed data communications. The Institute of Electrical and Electronics Engineers (IEEE) set the standards for communications—that's the 802.11 protocol, a familiar number ...
Oct 23, 2019
1
470
Hi Tech & Innovation
How far off are we from hopping on and off air taxis as a familiar local mode of transport? Eyes this week were fixed on one company aggressively keeping up its bit to open commercial routes and bring this type of mobility ...
Consumer & Gadgets
Around the world, more than 3 billion people—nearly half the world's population—cook their food using solid fuels like firewood and charcoal on open fires or traditional stoves. This produces a lot of smoke, creating ...
Jul 15, 2019
0
14
Energy & Green Tech
An international team of researchers has found that air pollution in China is dramatically reducing the amount of power that is generated by solar cells in that country. In their paper published in the journal Nature Energy, ...
Hardware
LG has made news headlines recently because now it has its own artificial intelligence chip. LG is out to impress with its own chip for smart home products—to make them even smarter.
Energy & Green Tech
Air pollution is responsible for millions of deaths every year, worldwide. According to a State of Global Air report, air pollution is the fifth greatest global mortality risk.
Engineering
Scientists have an idea that could make you feel more like a green citizen than hedonist if you buy an air conditioner for your living quarters. There is a way that could use the units to fight climate change. OK, let us ...
Engineering
If you've ever been to an air show, or lived near an air force base, you're familiar with sonic booms.
Mar 12, 2019
1
231
The Earth's atmosphere is a layer of gases surrounding the planet Earth that is retained by the Earth's gravity. It has a mass of about five quadrillion metric tons. Dry air contains roughly (by volume) 78.08% nitrogen, 20.95% oxygen, 0.93% argon, 0.038% carbon dioxide, and trace amounts of other gases. Air also contains a variable amount of water vapor, on average around 1%. The atmosphere protects life on Earth by absorbing ultraviolet solar radiation, warming the surface through heat retention (greenhouse effect), and reducing temperature extremes between day and night.
There is no definite boundary between the atmosphere and outer space. It slowly becomes thinner and fades into space. An altitude of 120 km (75 mi) marks the boundary where atmospheric effects become noticeable during atmospheric reentry. The Kármán line, at 100 km (62 mi), is also frequently regarded as the boundary between atmosphere and outer space. Three quarters of the atmosphere's mass is within 11 km (6.8 mi; 36,000 ft) of the surface.
This text uses material from Wikipedia, licensed under CC BY-SA
