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  2. Coefficient of restitution - Wikipedia

    en.wikipedia.org/wiki/Coefficient_of_restitution

    The COR is a property of a pair of objects in a collision, not a single object. If a given object collides with two different objects, each collision has its own COR. When a single object is described as having a given coefficient of restitution, as if it were an intrinsic property without reference to a second object, some assumptions have been made – for example that the collision is with ...

  3. Plasma parameters - Wikipedia

    en.wikipedia.org/wiki/Plasma_parameters

    The plasma collisionality is defined as [4] [5] =, where denotes the electron-ion collision frequency, is the major radius of the plasma, is the inverse aspect-ratio, and is the safety factor. The plasma parameters m i {\displaystyle m_{\mathrm {i} }} and T i {\displaystyle T_{\mathrm {i} }} denote, respectively, the mass and temperature of the ...

  4. Mean free path - Wikipedia

    en.wikipedia.org/wiki/Mean_free_path

    where ℓ is the mean free path, n is the number of target particles per unit volume, and σ is the effective cross-sectional area for collision. The area of the slab is L 2, and its volume is L 2 dx. The typical number of stopping atoms in the slab is the concentration n times the volume, i.e., n L 2 dx. The probability that a beam particle ...

  5. Reduced mass - Wikipedia

    en.wikipedia.org/wiki/Reduced_mass

    In a collision with a coefficient of restitution e, the change in kinetic energy can be written as = (), where v rel is the relative velocity of the bodies before collision. For typical applications in nuclear physics, where one particle's mass is much larger than the other the reduced mass can be approximated as the smaller mass of the system.

  6. Elastic collision - Wikipedia

    en.wikipedia.org/wiki/Elastic_collision

    In physics, an elastic collision is an encounter between two bodies in which the total kinetic energy of the two bodies remains the same. In an ...

  7. Collision theory - Wikipedia

    en.wikipedia.org/wiki/Collision_theory

    A scheme comparing direct collision and diffusive collision, with corresponding rate equations. For a diluted solution in the gas or the liquid phase, the collision equation developed for neat gas is not suitable when diffusion takes control of the collision frequency, i.e., the direct collision between the two molecules no longer dominates ...