ABSTRACT
The properties of gases at low pressures are studied by the physics of vacuum under the section of the molecular-kinetic theory of gases. The basic postulates of the physics of vacuum are as follows:
1. gas molecules move separately; 2. there is a permanent velocity distribution of gas molecules, i.e. the same number of
molecules always has the same velocity; 3. there are no predominant directions in the transport of gas molecules, i.e., the space
of gas molecules is isotropic; 4. the temperature of a gas is proportional to the mean kinetic energy of its molecules; 5. gases are adsorbed during the interaction with solid surfaces.
