NASA poised to break sound barrier without the sonic boom
Seventy-five years ago, a sonic boom thundered for the first time over the high desert of California.
Oct 18, 2022
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2104
Engineering
Seventy-five years ago, a sonic boom thundered for the first time over the high desert of California.
Oct 18, 2022
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2104
Business
Buoyed by full planes across the Atlantic this summer, United Airlines is planning another increase in its summer service from the United States to Europe next year.
Oct 12, 2022
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Business
A French trial of Air France and Airbus began Monday on charges of involuntary manslaughter over the fatal 2009 crash of a jet heading to Paris from Brazil, killing all 228 people aboard.
Oct 10, 2022
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Energy & Green Tech
UN aviation agency members reached an agreement Friday to try to achieve by 2050 net-zero carbon emissions in air travel—often criticized for its outsized role in climate change.
Oct 7, 2022
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Energy & Green Tech
Oil and gas prices skyrocketed following the Russian invasion of Ukraine in spring 2022, creating a global energy crisis similar to the oil crisis of the 1970s. While some countries used the price shock to accelerate the ...
Oct 6, 2022
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Software
The approach to an airport runway is a real challenge for pilots: reducing speed, extending flaps and speed brakes and much more—all with as little noise and fuel consumption as possible. Moreover, air traffic control restricts ...
Oct 6, 2022
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Engineering
A team of researchers has designed a high-performance composite sponge that works effectively to filter particulate matter in high temperature and high humidity environments. The sponge, with its excellent mechanical properties, ...
Oct 3, 2022
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Energy & Green Tech
Hurricane Ian's catastrophic winds and flooding are likely to bring long-lasting power outages to large parts of Florida. The storm is the latest in a line of hurricanes and extreme heat and cold events that have knocked ...
Sep 29, 2022
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Energy & Green Tech
A nationally representative survey of 8,027 Americans shows that across all racial demographics, overall interest in purchasing electric vehicles is high. Among those surveyed, 33% of white respondents, 38% of Black respondents, ...
Sep 28, 2022
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Engineering
Ensuring school classrooms are well ventilated is key to reducing the risk of COVID-19 transmission and maintaining academic performance, research from The University of Queensland has revealed.
Sep 16, 2022
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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