Telecom
The latest generation of smartphones, 5G, can interfere with aircraft altitude instruments, the French Civil Aviation Authority warned Tuesday as it recommended they should be turned off during flight.
Feb 16, 2021
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Energy & Green Tech
The honor of the 2020 Nobel Prize in Chemistry went to those who developed lithium-ion rechargeable batteries. These batteries have become an essential energy source for electronic devices ranging from small IT devices to ...
Feb 1, 2021
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Business
Boeing closed the books on a bruising 2020 by announcing another unpleasant surprise on Wednesday: a $6.5 billion hit from delays to its new 777X plane that exacerbated the aerospace giant's annual loss.
Jan 27, 2021
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Engineering
Additive manufacturing and computer design experts, the Air Force needs your ideas.
Jan 22, 2021
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Business
Proper maintenance procedures are in place to ensure that planes grounded for months or years due to worldwide travel restrictions are not an additional danger when they fly again.
Jan 21, 2021
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Automotive
US regulators on Tuesday ordered Ford to recall three million vehicles containing Takata airbags that show signs of "potential future rupture risk."
Jan 20, 2021
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Energy & Green Tech
NIMS and SoftBank discovered that the cycle life of high energy density lithium-air batteries is predominantly influenced by the ratio of electrolyte volume to electrode areal capacity. The team developed a technique to quantify ...
Jan 18, 2021
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Energy & Green Tech
Carbon-neutral aviation is possible, but in future, aircraft are likely to continue to be powered by fossil fuels. The CO2 they emit must be systematically stored underground. This is the most economical of various approaches ...
Jan 13, 2021
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Business
The Sriwijaya Air Flight 182 disaster serves as a warning for aviation safety regulators, not only in Indonesia but worldwide.
Jan 13, 2021
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Energy & Green Tech
There's no doubt the Earth's temperatures are going up. According to a December report by the World Meteorological Organization, 2020 is on track to be one of the three hottest years on record, already within the warmest ...
Dec 21, 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
