Business
American Airlines and four smaller carriers have reached agreement with the government for billions more in federal loans, a sign of the industry's desperate fight to survive a downturn in air travel caused by the virus pandemic.
Jul 2, 2020
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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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9
Hi Tech & Innovation
As a Delta Air Lines jet began roaring down a runway, an air traffic controller at New York's John F. Kennedy International Airport suddenly blurted out an expletive, then ordered the pilots to stop their takeoff roll.
Jun 13, 2024
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Business
American Airlines is planning to drop flights to up to 30 smaller U.S. cities if a federal requirement to continue those flights expires at the end of next month, an airline executive familiar with the matter said Thursday.
Aug 14, 2020
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Computer Sciences
Air traffic is a significant and complex problem. Near misses between passenger planes on runways have been making headlines lately and raising safety concerns as airports try to accommodate more travelers in the wake of ...
Mar 28, 2023
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34
Robotics
The air taxi market is almost ready for take off, with companies such as Boeing, Hyundai, Airbus and Toyota building fleets to have commuters flitting through the sky. Europe and the U.S. have both drafted new rules to pave ...
Jun 20, 2023
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Energy & Green Tech
Vast amounts of worldwide emissions can be traced back to the supply chains that provide us with the goods we need. Some studies estimate that they generate up to two-thirds of global carbon emissions.
Apr 9, 2024
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1
Business
Italy's new national carrier ITA Airways took its debut flight Friday, closing a turbulent chapter that witnessed the decline of the country's storied but ill-fated Alitalia after 74 eventful years.
Oct 15, 2021
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Hi Tech & Innovation
A project doer who is concerned about the effects of poor air quality has made a video in Singapore, "AI for Liveable Cities." Poor air quality is not just a challenge faced by Singapore, he said, with 7 billion of us sharing ...
Energy & Green Tech
Heat pumps can be used to both cool and heat homes. The 2022 federal Inflation Reduction Act provides financial incentives for installing one. SciLine interviewed Theresa Pistochini of the Energy Efficiency Institute and ...
Sep 7, 2023
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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
