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  2. Tachyon - Wikipedia

    en.wikipedia.org/wiki/Tachyon

    The term tachyon comes from the Greek: ταχύς, tachus, meaning swift. [6]: 515 The complementary particle types are called luxons (which always move at the speed of light) and bradyons (which always move slower than light); both of these particle types are known to exist.

  3. Granular convection - Wikipedia

    en.wikipedia.org/wiki/Granular_convection

    The result of all the particles settling in a different order may be an increase in the potential energy—a raising of the center of mass. When shaken, the particles move in vibration-induced convection flow; individual particles move up through the middle, across the surface, and down the sides. If a large particle is involved, it will be ...

  4. Stability of matter - Wikipedia

    en.wikipedia.org/wiki/Stability_of_matter

    The latter is always stable due to a theorem of Edward Teller which states that atoms can never bind in Thomas–Fermi model. [ 14 ] [ 15 ] [ 16 ] The Lieb–Thirring inequality was used to bound the quantum kinetic energy of the electrons in terms of the Thomas–Fermi kinetic energy ∫ R 3 ρ ( x ) 5 3 d 3 x {\displaystyle \int _{\mathbb {R ...

  5. Kinetic theory of gases - Wikipedia

    en.wikipedia.org/wiki/Kinetic_theory_of_gases

    The rapidly moving particles constantly collide among themselves and with the walls of the container, and all these collisions are perfectly elastic. Interactions (i.e. collisions) between particles are strictly binary and uncorrelated, meaning that there are no three-body (or higher) interactions, and the particles have no memory.

  6. Annihilation - Wikipedia

    en.wikipedia.org/wiki/Annihilation

    Momentum and energy are both conserved, with 1.022 MeV of photon energy (accounting for the rest energy of the particles) moving in opposite directions (accounting for the total zero momentum of the system). [3] If one or both charged particles carry a larger amount of kinetic energy, various other particles can be produced.

  7. Photon - Wikipedia

    en.wikipedia.org/wiki/Photon

    Photons are massless particles that can move no faster than the speed of light measured in vacuum. The photon belongs to the class of boson particles. As with other elementary particles, photons are best explained by quantum mechanics and exhibit wave–particle duality, their behavior featuring properties of both waves and particles. [2]

  8. Molecular diffusion - Wikipedia

    en.wikipedia.org/wiki/Molecular_diffusion

    Molecular diffusion, often simply called diffusion, is the thermal motion of all (liquid or gas) particles at temperatures above absolute zero. The rate of this movement is a function of temperature, viscosity of the fluid and the size (mass) of the particles.

  9. Brownian motion - Wikipedia

    en.wikipedia.org/wiki/Brownian_motion

    2-dimensional random walk of a silver adatom on an Ag(111) surface [1] Simulation of the Brownian motion of a large particle, analogous to a dust particle, that collides with a large set of smaller particles, analogous to molecules of a gas, which move with different velocities in different random directions.