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The positron or antielectron is the particle with an electric charge of +1e, a spin of 1/2 (the same as the electron), and the same mass as an electron.It is the antiparticle (antimatter counterpart) of the electron.
A positronic brain is a fictional technological device, originally conceived by science fiction writer Isaac Asimov. [ 1 ] [ 2 ] It functions as a central processing unit (CPU) for robots , and, in some unspecified way, provides them with a form of consciousness recognizable to humans .
Also acid ionization constant or acidity constant. A quantitative measure of the strength of an acid in solution expressed as an equilibrium constant for a chemical dissociation reaction in the context of acid-base reactions. It is often given as its base-10 cologarithm, p K a. acid–base extraction A chemical reaction in which chemical species are separated from other acids and bases. acid ...
Melting ice cubes illustrate the process of fusion. Melting, or fusion, is a physical process that results in the phase transition of a substance from a solid to a liquid. This occurs when the internal energy of the solid increases, typically by the application of heat or pressure, which increases the substance's temperature to the melting point.
The Gmelin rare earths handbook lists 1522 °C and 1550 °C as two melting points given in the literature, the most recent reference [Handbook on the chemistry and physics of rare earths, vol.12 (1989)] is given with 1529 °C.
Meaning SI unit of measure alpha: alpha particle: angular acceleration: radian per second squared (rad/s 2) fine-structure constant: unitless beta: velocity in terms of the speed of light c: unitless beta particle: gamma: Lorentz factor: unitless photon: gamma ray: shear strain: radian
Melting, in physics, the process of heating a solid substance to a liquid; Melt (manufacturing), the semi-liquid material used in steelmaking and glassblowing; Melt (geology), magma Melt inclusions, a feature of igneous rock; Meltwater, water released from the thawing of snow and ice; MLT framework, a software test tool for the Media Lovin' Toolkit
It has a mean lifetime of 0.12 ns and decays preferentially into two gamma rays with energy of 511 keV each (in the center-of-mass frame). Para-positronium can decay into any even number of photons (2, 4, 6, ...), but the probability quickly decreases with the number: the branching ratio for decay into 4 photons is 1.439(2) × 10 −6. [1]