What is the value for a standard atmosphere?
101,325 pascals
One standard atmosphere, which is also referred to as one atmosphere, is equivalent to 101,325 pascals, or newtons of force per square metre (approximately 14.7 pounds per square inch).
What is the atmospheric pressure at 50 km?
At sea level, atmospheric pressure is about 1,000 mb (100 kPa). At the top of Mt. Everest—a height of 29,032 feet (8.85 kilometers)—pressure drops to about 300 mb (30 kPa). The air is so thin at an altitude of 31 miles (50 kilometers) that it exerts a pressure of only 1 mb (0.1 kPa).
What is meant by Standard atmosphere?
1 : an arbitrary ideal set of atmospheric conditions (as used in calculations of aircraft performance) specifically : the international standard specifying a temperature of 15° C and 760 millimeters pressure at sea level with a vertical temperature gradient of −6.5° C per kilometer up to 11 kilometers altitude and …
What is an atmosphere measurement?
An atmosphere (atm) is a unit of measurement equal to the average air pressure at sea level at a temperature of 15 degrees Celsius (59 degrees Fahrenheit). The number of atmospheres drops as altitude increases because the density of air is lower and exerts less pressure.
Is 100 atm a standard condition?
Option C (100 atm) is not a standard condition and therefore the correct answer.
Why is Standard Atmosphere used?
International Standard Atmosphere (ISA) is a model used for the standardization of aircraft instruments. It was established, with tables of values over a range of altitudes, to provide a common reference for temperature and pressure. Flying in ISA-plus temperatures will have a negative impact on aircraft performance.
What is the pressure of the atmosphere at 11km?
22,632 pascals
The tropospheric tabulation continues to 11,000 meters (36,089 ft), where the temperature has fallen to −56.5 °C (−69.7 °F), the pressure to 22,632 pascals (3.2825 psi), and the density to 0.3639 kilograms per cubic meter (0.02272 lb/cu ft). Between 11 km and 20 km, the temperature remains constant.
What is the atmospheric pressure at 30000 feet?
4.3 PSI
Pressure at 100m
| Altitude | Air Pressure |
|---|---|
| Sea Level | 14.7 PSI |
| 10,000 feet | 10.2 PSI |
| 20,000 feet | 6.4 PSI |
| 30,000 feet | 4.3 PSI |
What is the temperature at 11km?
ICAO Standard Atmosphere
| Height km & ft | Temperature °C | Lapse rate °C/1000 ft |
|---|---|---|
| 0 km MSL | 15.0 | −1.98 (tropospheric) |
| 11 km 36 000 ft | −56.5 | 0.00 (stratospheric) |
| 20 km 65 000 ft | −56.5 | +0.3 (stratospheric) |
| 32 km 105 000 ft | −44.5 |