Kr枚nig has recently proposed that the molecules of a gas do not oscillate about definite positions of equilibrium, but that they move with constant velocity in straight lines until they strike against other molecules, or against the surface of the container. I share this view, but believe ...
Spacecrafts free of all but gravitational forces are important in precision navigation, gravity field measurement and basic scientific research. The Inner-... HW Liu,WY Zhang - 《Science China Technological Sciences》 被引量: 24发表: 2011年 Dynamic Equations for Tachyon Gas Although molecules (tachy...
3 (a) (i) One of the assumptions of the kinetic theory of gases is that the motion of gas molecules is random. Therefore explain why the average momentum of the gas molecules in a container is zero.[2](ii) According to the kinetic theory of gases, explain how a gas exerts a pressur...
1.The lower the temperature, the slower the motion of the molecules.温度越低,分子运动越慢。 2.The molecules of gases move more freely than do those of liquids and solids.气体分子运动比液体分子和固体分子运动更为自由。 3.Micronozzle flow based on simulation of molecule movement基于分子运动模拟...
The Brownian motion of a hard spherical particle in a gas whose molecules interact only with the particle but not with each other is considered from three points of view. (a) The generalized Fokker‐Planck equation for the process is derived by the classical method of Lord Rayleigh. (b) The...
The agitation and migration of small colloidal particles has been known since the work of Robert Brown in the early nineteenth century. This thermal motion is likened to the diffusion of gas molecules in a nonuniform gas. The applicability of Fick's equations for the diffusion of particles in ...
The motion of small suspended particles in a gas or gas mixture containing gradients of temperature, pressure, or composition is derived as a special case of the Chapman‐Enskog kinetic theory of gases, by formally treating the suspended particles as large molecules. Gas molecules colliding with th...
the random motion of small colloidal particles suspended in a liquid or gas medium, caused by the collision of the medium's molecules with the particles. Also calledBrown′ian move′ment. [1870–75; after RobertBrown(1773–1858), Scottish botanist, who described it in 1827] ...
A kinetic–theoretic approach is employed under the condition that the distance between the two plates is comparable to the mean free path of the gas molecules and/or the frequency of oscillation of the plate is comparable to their mean collision frequency. More specifically, the Bhatnagar–Gross...
For example, the molecules of gas in translational motion move almost as free particles, and this motion can always be treated classically, but the motion of atoms in the molecule is of the nature of small oscillations in a “potential well” around certain equilibrium positions, and classical ...