## What is the pressure at 18000 feet?

14.7 pounds per square inch
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.

## What is the atmospheric pressure at 15000 feet?

Example – Air pressure at Elevation 10000 m

Altitude Above Sea Level Absolute Atmospheric Pressure
feet metre psia
9000 2743 10.5
10000 3048 10.1
15000 4572 8.29

What is the atmospheric pressure at 16000 feet?

Elevation – air temperature, pressure and air density

Altitude (feet) Abs. Pressure (in. Hg) Temp. (F)
10000 20.57 23.3
12000 19.02 16.2
14000 17.57 9.1
16000 16.21 1.9

How much does air pressure change with altitude?

Since more than half of the atmosphere’s molecules are located below an altitude of 5.5 km, atmospheric pressure decreases roughly 50% (to around 500 mb) within the lowest 5.5 km. Above 5.5 km, the pressure continues to decrease but at an increasingly slower rate.

### What is the air pressure at 100000 feet?

The density increases as pressure increases. Altitude and weather systems can change the air’s pressure. As you go higher, the air’s pressure decreases from around 1,000 millibars at sea level to 500 millibars at around 18,000 feet. At 100,000 feet above sea level the air’s pressure is only about 10 millibars.

### What is the water pressure at 3000 feet?

EXAMPLE (Imperial)

Depth (meters/feet) Fresh Water (1000 kg/m3)
610 meters (2,000 feet) 6.1 MPa 881.7 PSI
914.4 meters (3,000 feet) 9.1 MPa 1,314.4 PSI
1,219.2 meters (4,000 feet) 12 MPa 1,747.6 PSI
1,525 meters (5,000 feet) 15MPa 2,182.3 PSI

What is the temperature at 15000 feet?

U.S. Standard Atmosphere Air Properties – Imperial (BG) Units

Geo-potential Altitude above Sea Level – h – (ft) Temperature – t – (oF) Dynamic Viscosity – μ – (10-7 lb s/ft2) (10-7 slug /(ft s))
10000 23.36 3.534
15000 5.55 3.430
20000 -12.26 3.324
25000 -30.05 3.217

How cold is it at 24000 feet?

Standard atmospheric pressure at sealevel = 29.92 inches of Hg. Temperature — As air is warmed, it expands and thus has a lower density. Hot air rises, which is what keeps hot-air balloons up, and cold air sinks. Standard atmospheric temperature at sealevel = 59.0°F.

#### Is it true that as altitude increases air pressure decreases?

As altitude rises, air pressure drops. In other words, if the indicated altitude is high, the air pressure is low. As altitude increases, the amount of gas molecules in the air decreases—the air becomes less dense than air nearer to sea level.

#### What happens when air exerts pressure on our body?

Answer: The pressure exerted by air on all bodies at all times in all directions is called air pressure. When air moves at high speeds, it creates a low pressure area. The air inside a balloon exerts pressure in all directions, and makes it blow up.

What is the air pressure at 38000 feet?

3.2. At the normal stratospheric cruising altitudes of 30,000–38,000 ft, the outside pressure is 0.3–0.2 atm, respectively, while the cabin pressure is maintained at a level equal to that found at altitudes between about 5500 ft and 8000 ft, or between about 0.8 and 0.7 atm.

How cold is it at 50000 feet?

U.S. Standard Atmosphere Air Properties – Imperial (BG) Units

Geo-potential Altitude above Sea Level – h – (ft) Temperature – t – (oF) Absolute Pressure – p – (lb/in2)
45000 -69.70 2.149
50000 -69.70 1.692
60000 -69.70 1.049
70000 -67.42 0.651