What is the average atmospheric pressure at 18000 feet MSL?
3 min read
Asked by: Ronald Screeton
Pressure on average will decrease by nearly half for each 18,000 feet of altitude. The ISA surface pressure is 29.92 in. Hg (1,013.25 mb) or 14.7 pounds per square inch, and at 18,000 feet it will decrease by half to about 14.94 in. Hg (500 mb) or 7.35 pounds per square inch.Sep 8, 2014
What is the atmospheric pressure at 20000 feet?
Example – Air pressure at Elevation 10000 m
| Altitude Above or Below Sea Level | Absolute Atmospheric Pressure | |
|---|---|---|
| feet | metre | psia |
| 10000 | 3048 | 10.1 |
| 15000 | 4572 | 8.29 |
| 20000 aprox. Mount McKinley, Alaska, US | 6096 | 6.75 |
What is the pressure at MSL?
1013.25 hPa
The average pressure at mean sea-level (MSL) in the International Standard Atmosphere (ISA) is 1013.25 hPa, or 1 atmosphere (atm), or 29.92 inches of mercury.
Why is there less atmospheric pressure at 18000 feet than at sea level?
What has caused this atmospheric pressure drop? The answer is simple: There is more air stacked up at sea level than above 18,000 feet, and therefore, more weight.
Nov 18, 2010
What is the atmospheric pressure at 15000 feet?
Relationship Between Altitude and Pressure
| Altitude above Sea Level | Absolute Atmospheric Pressure | |
|---|---|---|
| 10000 | 1.89 | 69.7 |
| 15000 | 2.84 | 57.2 |
| 20000 | 3.79 | 46.6 |
| 25000 | 4.73 | 37.6 |
What is the pressure at 18000 feet?
Pressure on average will decrease by nearly half for each 18,000 feet of altitude. The ISA surface pressure is 29.92 in. Hg (1,013.25 mb) or 14.7 pounds per square inch, and at 18,000 feet it will decrease by half to about 14.94 in. Hg (500 mb) or 7.35 pounds per square inch.
Sep 8, 2014
What is the pressure at 36000 feet deep?
The crushing water pressure on the floor of the trench is more than 8 tons per square inch (703 kilograms per square meter).
May 16, 2022
How does atmospheric pressure change with height above sea level?
As altitude increases, the amount of gas molecules in the air decreases—the air becomes less dense than air nearer to sea level. This is what meteorologists and mountaineers mean by “thin air.” Thin air exerts less pressure than air at a lower altitude.
May 19, 2022
Is 1018 hPa high pressure?
Pressure is usually around 1000hPa, and at sea level it rarely gets lower than 950hPa or higher than 1050 hPa. High pressure gives fine, dry weather – warm in summer (remember how glorious July was!) but with cold nights in winter. Low pressure, on the other hand, brings cloud, rain and strong winds.
How much does air pressure change with altitude?
Air pressure, also known as barometric pressure, decreases as altitude increases. Within the lower atmosphere, air pressure drops by about 50% after every 5,000 meters in elevation.
Nov 30, 2021
What will be the atmospheric pressure at an altitude of 5000m?
74kgm3 at an altitude of 5000m. Atmospheric pressure at the Earths surface on a particular day is 100000Pa. The value of g between the Earths surface and an altitude of 5000 m can be considered to have a constant. value of 9.7ms2.
What is the air pressure at 11000 feet?
Elevation Versus Atmospheric Pressure
| Elev(ft) | PSIA | “HgA |
|---|---|---|
| 8000 | 10.91 | 22.22 |
| 9000 | 10.5 | 21.38 |
| 10000 | 10.1 | 20.58 |
| 11000 | 9.71 | 19.75 |
