Gravitational acceleration is fairly the same considering the depth of atmosphere. So, it can only be a correction to the atmospheric model rather than the main principle.
I guess also you can include centrifugal force in the gravitational acceleration, because they are in the opposite direction Be aware that centrifugal force is just an imaginary force that you may add to the equation. You can imagine the radius of Earth and compare it to the depth of atmosphere to guess if the radius dependent terms such as gravity or centrifugal force is important with respect to other changes in your equation.
If you want to do a precise calculation to compare two regions, the poles and the equator, you can add the centrifugal acceleration part too. The air certainly pushes down the other air molecules, thus increase the pressure. It is the same principle Bernoulli's that is applied also in the pressure change in liquids. Sign up to join this community. The best answers are voted up and rise to the top.
Stack Overflow for Teams — Collaborate and share knowledge with a private group. Create a free Team What is Teams? Learn more. Why does air pressure decrease with altitude? Ask Question. Asked 10 months ago. Active 10 months ago. Viewed 6k times. Improve this question. Ted Staggs Ted Staggs 1 1 silver badge 7 7 bronze badges. So is gravity, but you can have either one without the other. Then have someone lie on top of you. Then someone on top of them.
Repeat until you're buried under people. Why does the person at the bottom feel more squished than the person on top?
My cats have been performing that experiment for years. I'm still waiting to read about their scientific conclusions. Add a comment. Active Oldest Votes. Improve this answer. Sandejo Sandejo 4, 1 1 gold badge 16 16 silver badges 37 37 bronze badges.
Clearly, atmospheric pressure is almost non-existent, which hints at the fact that the two are unrelated. Close Search Search. Back to Research Engineering Dimensional metrology Electrochemistry Electronic and magnetic materials Mass and mechanical measurement Temperature and humidity.
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This is due to the low air pressure. Air expand s as it rises, and the fewer gas molecules—including nitrogen, oxygen, and carbon dioxide—have fewer chances to bump into each other. The human body reacts to high altitudes.
Decreased air pressure means that less oxygen is available for breathing. One normal effect of altitude is shortness of breath, since the lungs have to work harder to deliver oxygen to the bloodstream. It can take days and even weeks for a body to adjust to high altitude and low air pressure. People who spend too much time in high-altitude locations risk more serious symptoms of altitude sickness. These may range from headaches and dizziness to much more serious consequence s, such as brain or lung damage.
Above about 8, meters 26, feet , the human body cannot survive at all, and starts to shut down. Mountaineers call this altitude the "death zone. To prevent severe altitude sickness, mountaineers bring supplemental extra supplies of oxygen and limit their time in the "death zone. Different regions have different air pressures, even at the same altitude.
Factors such as climate and humidity impact local air pressure. Air pressure also decreases around the pole s. For this reason, if Mount Everest was located in the U. In astronomy , altitude has a somewhat different meaning. It describes the angle between the horizon and some point in the sky. For example, if a star is directly overhead, its altitude is 90 degrees. If a star has just set or is just about to rise, it is right at the horizon and has an altitude of 0 degrees.
The North Star , Polaris, does not rise or set because the Earth's axis passes directly through it. It thus has a constant altitude when viewed from anywhere in the Northern Hemisphere. This makes it incredibly useful in celestial navigation. Mount Everest is the highest point of altitude on Earth. Photograph by George F. Northern Hemisphere. North Star.
Also called the Lodestar or Pole Star. Media Credits The audio, illustrations, photos, and videos are credited beneath the media asset, except for promotional images, which generally link to another page that contains the media credit. Last Updated Jan. Media If a media asset is downloadable, a download button appears in the corner of the media viewer.
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Related Resources. Limiting Factors. View Collection. Abiotic Factors. Concept of Place.
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