30 to 60 kms
A not-commonly-used measurement is 'atmosphere'. One atmosphere is the average pressure at sea-level: 101.325 kPa, 1013.25 mbar, 29.921 inches of mercury (inHg) or 760 millimeters of mercury (mmHg).
When standard atmospheric conditions exist.
provided the balloon has not reached its elastic limit (it has burst!), the air pressure inside and outside will essentially be equal. [The pressure inside will be slightly less, which is where the lift comes from.] But even at altitude, the pressure will be approximately equal in and out, for at altitude, the balloon will have swelled, thus reducing the internal pressure. It will eventually reach an altitude at which the internal pressure and the external pressure will be equal, and the balloon will have reached maximum expansion. Filled at sea level, a balloon will seem empty and floppy, and very tall and thin. At altitude the balloon will fill out as the external pressure reduces.
Atmospheric pressure is defined as the force per unit area exerted against a surface by the weight of air. Air pressure above sea level can be calculated as p = 101325 (1 - 2.25577 10-5 h)5.25588 where p = air pressure (Pa) h = altitude above sea level (m) The standard atmosphere is a unit of pressure and is defined as being equal to 101.325 kPa.
Standard air pressure at sea level is 1 atmosphere, or 1 atm. This is the adopted standard atmosphere value, but sea level pressure will not always equal to this value due to changes in weather. 1 atm = 101 325 pascals = 1.01325 bars.
A not-commonly-used measurement is 'atmosphere'. One atmosphere is the average pressure at sea-level: 101.325 kPa, 1013.25 mbar, 29.921 inches of mercury (inHg) or 760 millimeters of mercury (mmHg).
When standard atmospheric conditions exist.
Density Altitude is the altitude relative to the standard atmosphere conditions (ISA) at which the air density will be equal to the indicated at the place of observation.
One atmosphere is 14.7 psi (rounded)
100km
provided the balloon has not reached its elastic limit (it has burst!), the air pressure inside and outside will essentially be equal. [The pressure inside will be slightly less, which is where the lift comes from.] But even at altitude, the pressure will be approximately equal in and out, for at altitude, the balloon will have swelled, thus reducing the internal pressure. It will eventually reach an altitude at which the internal pressure and the external pressure will be equal, and the balloon will have reached maximum expansion. Filled at sea level, a balloon will seem empty and floppy, and very tall and thin. At altitude the balloon will fill out as the external pressure reduces.
all solvent has vapour pressure properties is there when the vapor pressure is equal to atmosphere at that patricular temperature is boiling point
Atmospheric pressure is defined as the force per unit area exerted against a surface by the weight of air. Air pressure above sea level can be calculated as p = 101325 (1 - 2.25577 10-5 h)5.25588 where p = air pressure (Pa) h = altitude above sea level (m) The standard atmosphere is a unit of pressure and is defined as being equal to 101.325 kPa.
10 meters of water depth equals about 1 atmosphere.
Atmospheric pressure is approximately equal to 14.7 pounds per square inch One bar is equal to one atmosphere
One ATM, Atmosphere, is equal to 1033.2275548 grams. An ATM is a unit of pressure. Pressure is equal to the force divided by the area.
Pressure difference of one hectopascal equals an altitude difference of 30 feet.