Energy & Green Tech
The next group of electric vehicle charging station grants from Minnesota's Volkswagen emissions-cheating settlement will prioritize projects that incorporate solar panels or other sources of local clean energy.
Dec 12, 2020
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Other
Imagine a world of aerial delivery drones bringing goods right to your door, small air taxis with fewer than six passengers flying about cities, supersonic airliners crossing continents and oceans, and sixth-generation fighter ...
Dec 11, 2020
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Automotive
If air taxis become a viable mode of transportation, Oak Ridge National Laboratory researchers have estimated they could reduce fuel consumption significantly while alleviating traffic congestion.
Dec 2, 2020
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Engineering
A mock B61-12's strike in the dusty Nevada desert successfully completed the first in a series of flight tests with the U.S. Air Force's newest fighter jet, demonstrating the bomb's first release from an internal bomb bay ...
Nov 23, 2020
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Business
After nearly two years and a pair of deadly crashes, the U.S. Federal Aviation Administration has cleared Boeing's 737 Max for flight.
Nov 18, 2020
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The nation's first regional hub for "flying cars" is being built in central Florida and once completed in five years, the vehicles will be able to take passengers from Orlando to Tampa in a half hour, officials said Wednesday.
Nov 12, 2020
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Consumer & Gadgets
Apple is rolling out new Mac computers powered by the same kind of chips that run iPhones and iPads, a move aimed at making it easier for its most popular products to work together.
Nov 10, 2020
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Business
Boeing is lowering its expectations around demand for new planes over the next decade as the coronavirus pandemic continues to undercut air travel.
Oct 6, 2020
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Business
With the coronavirus crisis putting a chill on travel, European airlines are reducing fares to attract passengers and fill the planes that are still flying.
Sep 27, 2020
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Electronics & Semiconductors
TU Graz, AMSm, and Silicon Austria Labs have developed a compact, energy-efficient sensor for mobile devices that informs users in real time about the fine dust content in the air and warns them of elevated values.
Sep 24, 2020
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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
