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How to make a coarse grain model based on atomistic simulations
How to make a coarse grain model based on atomistic simulations

... averages over degrees of freedom (electronic) that are usually well separated from the one retained (nuclear) ...
The hydrogen atom as an entangled electron–proton system
The hydrogen atom as an entangled electron–proton system

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Part 1 Set 1 - FacStaff Home Page for CBU
Part 1 Set 1 - FacStaff Home Page for CBU

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CCLRC Technology Press Release form (2)

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Homework #01 - TTU Physics
Homework #01 - TTU Physics

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... • Its average propagation velocity is c/2 and the average length is 3.2 km • NBPs are accompanied by intensive radio emission in the frequency range up to 500 MHz. ...
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... 23.8.1. Consider the situation shown to the left below. There are two parallel non-conducting plates. The plate on the left is positively charged with (3/2) the surface charge density to that of the right plate, which is negatively charged. Which one of the drawings shows the correct net electric f ...
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... example Fe(OH)3 adsorbs Fe3+ ions from FeCl3 (peptizing agent) and thereby gets a positive charge on the surface. Particles carrying similar charges get separated, yielding smaller sized colloidal particles of the type Fe(OH)3Fe3+ (Figure 6). Similarly, As2S3 precipitate obtained by passing H2S thro ...
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Systems of Particles - University of Central Florida
Systems of Particles - University of Central Florida

... Two blocks are free to slide along the frictionless wooden track ABC shown in Figure. A block of mass m1 = 5.00 kg is released from A. Protruding from its front end is the north pole of a strong magnet, repelling the north pole of an identical magnet embedded in the back end of the block of mass m2 ...
Phys. Rev. Lett. 103, 023601 (2009).
Phys. Rev. Lett. 103, 023601 (2009).

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Elementary particle



In particle physics, an elementary particle or fundamental particle is a particle whose substructure is unknown, thus it is unknown whether it is composed of other particles. Known elementary particles include the fundamental fermions (quarks, leptons, antiquarks, and antileptons), which generally are ""matter particles"" and ""antimatter particles"", as well as the fundamental bosons (gauge bosons and Higgs boson), which generally are ""force particles"" that mediate interactions among fermions. A particle containing two or more elementary particles is a composite particle.Everyday matter is composed of atoms, once presumed to be matter's elementary particles—atom meaning ""indivisible"" in Greek—although the atom's existence remained controversial until about 1910, as some leading physicists regarded molecules as mathematical illusions, and matter as ultimately composed of energy. Soon, subatomic constituents of the atom were identified. As the 1930s opened, the electron and the proton had been observed, along with the photon, the particle of electromagnetic radiation. At that time, the recent advent of quantum mechanics was radically altering the conception of particles, as a single particle could seemingly span a field as would a wave, a paradox still eluding satisfactory explanation.Via quantum theory, protons and neutrons were found to contain quarks—up quarks and down quarks—now considered elementary particles. And within a molecule, the electron's three degrees of freedom (charge, spin, orbital) can separate via wavefunction into three quasiparticles (holon, spinon, orbiton). Yet a free electron—which, not orbiting an atomic nucleus, lacks orbital motion—appears unsplittable and remains regarded as an elementary particle.Around 1980, an elementary particle's status as indeed elementary—an ultimate constituent of substance—was mostly discarded for a more practical outlook, embodied in particle physics' Standard Model, science's most experimentally successful theory. Many elaborations upon and theories beyond the Standard Model, including the extremely popular supersymmetry, double the number of elementary particles by hypothesizing that each known particle associates with a ""shadow"" partner far more massive, although all such superpartners remain undiscovered. Meanwhile, an elementary boson mediating gravitation—the graviton—remains hypothetical.
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