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Mean inter-particle distance (or mean inter-particle separation) is the mean distance between microscopic particles (usually atoms or molecules) in a macroscopic body.
In physics, mean free path is the average distance over which a moving particle (such as an atom, a molecule, or a photon) travels before substantially changing its direction or energy (or, in a specific context, other properties), typically as a result of one or more successive collisions with other particles.
We can take the average interparticle spacing in the gas to be approximately (V/N) 1/3 where V is the volume and N is the number of particles. When the thermal de Broglie wavelength is much smaller than the interparticle distance, the gas can be considered to be a classical or Maxwell–Boltzmann gas.
Mean free time; Mean inter-particle distance; ... Mirror Fusion Test Facility; Mirror furnace; ... Motion graphs and derivatives;
Ancestral graph; Anchor test; ... Interquartile mean; Interquartile range; Inter-rater reliability; ... Minimum distance estimation; Minimum mean square error;
The Lennard-Jones Potential is a mathematically simple model for the interaction between a pair of atoms or molecules. [3] [4] One of the most common forms is = [() ()] where ε is the depth of the potential well, σ is the finite distance at which the inter-particle potential is zero, r is the distance between the particles.
The average distance that a particle travels between collisions depends on the density of gas particles. These quantities are related by =, where σ is the cross section of a two-particle collision (SI unit: m 2), λ is the mean free path between collisions (SI unit: m),
The mean free time for a molecule in a fluid is the average time between collisions. The mean free path of the molecule is the product of the average speed and the mean free time. [ 1 ] These concepts are used in the kinetic theory of gases to compute transport coefficients such as the viscosity .