News tagged with air pressure
Tiny Music Player Made from Wire Bridge (w/ Video)
(PhysOrg.com) -- In 2008, scientists built a loudspeaker made of carbon nanotubes that produced sound and music based on the thermoacoustic effect. Now, a different team of scientists has built a loudspeaker ...
Nov 04, 2009 |
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Microbial life on Mars: Could saltwater make it possible?
(PhysOrg.com) -- How common are droplets of saltwater on Mars? Could microbial life survive and reproduce in them? A new million-dollar NASA project led by the University of Michigan aims to answer those questions.
Space & Earth / Space Exploration
Aug 17, 2011 |
4.9 / 5 (9) |
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Mosses use 'mushroom clouds' to spread spores (w/ Video)
(PhysOrg.com) -- Scientists in the US have solved the mystery of how peat mosses manage to get their spores high enough to catch the wind, discovering that they produce vortex rings of air, like miniature ...
Jul 23, 2010 |
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New study shows correlation between summer Arctic sea ice cover and winter weather in Central Europe
Even if the current weather situation may seem to speak against it, the probability of cold winters with much snow in Central Europe rises when the Arctic is covered by less sea ice in summer. Scientists of the Research Unit ...
Space & Earth / Earth Sciences
Feb 01, 2012 |
4.8 / 5 (6) |
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Space station's close call with junk: More to come (Update 2)
(AP) -- The near-hit of space junk Thursday was a warning shot fired across the bow of the international space station, experts said. There's likely more to come in the future. With less than an hour's notice, ...
Space & Earth / Space Exploration
Mar 12, 2009 |
4.8 / 5 (5) |
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Researchers Study Cave's 'Breathing' for Better Climate Clues
(PhysOrg.com) -- A University of Arkansas researcher studying the way caves "breathe" is providing new insights into the process by which scientists study paleoclimates.
Space & Earth / Earth Sciences
Mar 09, 2009 |
4.3 / 5 (3) |
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Making liquid power
(PhysOrg.com) -- Power is a game of supply and demand. Unfortunately, it is also a very time sensitive game. You not only have to make the right amount of power, but you have to make it at the right time. ...
Technology / Energy & Green Tech
Mar 29, 2011 |
4.3 / 5 (3) |
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Researchers look at effects of weather, air pollution on headaches
Although large numbers of headache sufferers, particularly individuals who struggle with migraines, attribute their pain to the weather, there has been little scientific evidence to back up their assertions. Now, a study ...
Medicine & Health / Neuroscience
Mar 09, 2009 |
5 / 5 (2) |
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Putting muscle into birdsong: Wide range of pitch is due to vocal muscles more than air pressure
Female zebra finches don't sing but make one-note, low-pitch calls. Males sing over a wide range of frequencies. University of Utah scientists discovered how: The males' stronger vocal muscles, not the pressure ...
Jun 29, 2010 |
5 / 5 (2) |
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Under pressure: Stormy weather sensor for hurricane forecasting
It’s hard to believe that, in this day and age, we don’t have a way to measure sea-level air pressure during hurricanes. NASA researchers, however, are working on a system that will improve forecasting ...
Space & Earth / Earth Sciences
Jan 11, 2011 |
5 / 5 (1) |
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Atmospheric pressure
Atmospheric pressure is sometimes defined as the force per unit area exerted against a surface by the weight of air above that surface at any given point in the Earth's atmosphere. In most circumstances atmospheric pressure is closely approximated by the hydrostatic pressure caused by the weight of air above the measurement point. Low pressure areas have less atmospheric mass above their location, whereas high pressure areas have more atmospheric mass above their location. Similarly, as elevation increases there is less overlying atmospheric mass, so that pressure decreases with increasing elevation. A column of air one square inch in cross-section, measured from sea level to the top of the atmosphere, would weigh approximately 65.5 newtons (14.7 lbf). The weight of a 1 m2 (11 sq ft) column of air would be about 101 kN (10.3 tf).
For more information about Atmospheric pressure, read the full article at
Wikipedia.
This text uses material from Wikipedia and is available under the GNU Free Documentation License.
