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What classicality? Decoherence and Bohr`s classical concepts
What classicality? Decoherence and Bohr`s classical concepts

Two interacting spin particles - Dipartimento di Matematica e Fisica
Two interacting spin particles - Dipartimento di Matematica e Fisica

... space. Our purpose is analyzing the structure of eigenstates and of the LDOS, and comparing it with expectations based on previous random matrix studies and with their classical counterparts. First of all we find that, when written in the eigenbasis of two noninteracting particles, reordered in the ...
Gas phase chemistry of neutral metal clusters
Gas phase chemistry of neutral metal clusters

Why is there an invariant speed c?
Why is there an invariant speed c?

... This formula itself seemingly suggests that gravity originates from the discreteness of spacetime (together with the quantum principle that requires   0 ). ...
WA AP Chem gas law IMF MC Set C
WA AP Chem gas law IMF MC Set C

... B. The intermolecular forces, such as hydrogen bonds, between the H2O (l) molecules require energy to be overcome, and the molecules can only separate to become a gas once these intermolecular forces are overcome. C. Water vapor is hotter than or equal in temperature to water at constant pressure, a ...
Elementary Particle Physics
Elementary Particle Physics

... SU(2) symmetry to determine the allowed flavour combinations. (3) Quarks (antiquarks) carry a colour quantum number: r , g , b (r , g , b ) When adding colours nature has chosen an SU(3) symmetry to determine the possible colour combinations. Nature always chooses hadrons to be colour singlets. With ...
Nonequilibrium effects in transport through quantum dots - ICMM-CSIC
Nonequilibrium effects in transport through quantum dots - ICMM-CSIC

... the role of single-electron charging is well understood.1 Processes which otherwise are found in solids at the single-atom level, such as the Kondo effect, are being currently investigated.2 Other atomic features, like the existence of high-spin ground states, have also been observed.3 The existence ...
Stoichiometry: Calculations with Chemical Formulas and Equations
Stoichiometry: Calculations with Chemical Formulas and Equations

... One mole of atoms, ions, or molecules contains Avogadro’s number of those particles One mole of molecules or formula units contains Avogadro’s number times the number of atoms or ions of each element in the compound Stoichiometry ...
The Doppler Effect of Absorption Spectral Lines in Moving
The Doppler Effect of Absorption Spectral Lines in Moving

... but this “zeroing” effect given by the formula does not happen instantaneously. The formula ignores the dramatically important time difference between the moment of photon emission at the emitter (the star) and the moment of photon reception at the detector (the atmosphere). Unfortunately all Dopple ...
tests so far
tests so far

Quantum walk as a generalized measuring device
Quantum walk as a generalized measuring device

... state, if at position x = −1 it was |ψ− i state, and if at position x = 3 one learns nothing. In the appendix A we show that the above quantum walk indeed generates the POVM elements corresponding to the unambiguous state discrimination problem. Generation of arbitrary rank 1 POVM elements. We focus ...
industry: applying chemical reactions
industry: applying chemical reactions

... Riverwood community needs new jobs, it’s foolish to invite either EKS Nitrogen Products Company or WYE Battery Technology Corporation to locate here to manufacture, respectively, ammonia or lithium-ion batteries, without first considering all the consequences. The promise of 200 new jobs is alluring ...
Interaction- and measurement-free quantum Zeno gates for universal computation
Interaction- and measurement-free quantum Zeno gates for universal computation

... Several schemes for quantum entanglement manipulation and/or gate operation via IFM have been recently proposed 关50–54兴. Utilizing the dissipative photon-atom interaction, Gilchrist et al. propose implementing conditional, postselection protocols to generate Bell-, W-, and Greenberger-HorneZeilinger ...
Stoichiometry: Calculations with Chemical Formulas and Equations
Stoichiometry: Calculations with Chemical Formulas and Equations

... One mole of atoms, ions, or molecules contains Avogadro’s number of those particles One mole of molecules or formula units contains Avogadro’s number times the number of atoms or ions of each element in the compound Stoichiometry ...
Inorganic Pharmaceutical Chemistry Hybrid Orbitals Hybridization
Inorganic Pharmaceutical Chemistry Hybrid Orbitals Hybridization

... valence bond theory failed to correctly predict them. It is experimentally observed that bond angles in organic compounds are close to 109o, 120o, or 180o. According to Valence Shell Electron Pair Repulsion (VSEPR) theory, electron pairs repel each other and the bonds and lone pairs around a central ...
Oxygen Carriers Materials for Chemical
Oxygen Carriers Materials for Chemical

- Philsci
- Philsci

... ontology, being some sort of a “non-local beable” that there is over and above the “local beables” which constitute the primitive ontology (see again Dürr, Goldstein and Zanghì 2013: chs. 11.5 and 12). The main reason for doing so is that the primitive ontology is not sufficient to determine the uni ...
Action-dependent wave functions: Definition
Action-dependent wave functions: Definition

... packet is hard to interpret due to the large amount of dispersion for the parameters that were chosen. As an example, after three periods the radial distribution is mostly at the outer turning point instead of at small r. There is an interesting point of physics to which I will return in a later sec ...
che 3221-analytical chemistry ii - UR-CST
che 3221-analytical chemistry ii - UR-CST

... a. If the absolute uncertainty in reading a buret is constant at ±0.02 mL, what will be the percent relative uncertainty: (a) for a volume of 15 mL, (b) for a volume of 0.085 L. (4 marks) b. With a schematic diagram, explain how Gravimetric combustion analysis for carbon and hydrogen is achieved ...
Document
Document

Chemical Reactions and Equations - 2012 Book Archive
Chemical Reactions and Equations - 2012 Book Archive

... two solid rocket boosters, which use a solid fuel mixture that contains mainly ammonium perchlorate and powdered aluminum. The chemical reaction between these substances produces aluminum oxide, water, nitrogen gas, and hydrogen chloride. Although the solid rocket boosters each have a significantly ...
The unique electronic properties of graphene – a one-atom
The unique electronic properties of graphene – a one-atom

... data is regarded as one of the greatest successes of condensed-matter physics. Massless electrons We are already familiar with massless Dirac fermiGraphene’s unique properties arise from the collective behaviour of electrons. That in itself is nothing new: as ons in high-energy particle physics: neu ...
First-Principles Studies of Paramagnetic Vivianite Fe3(PO4)2·8H2O
First-Principles Studies of Paramagnetic Vivianite Fe3(PO4)2·8H2O

SUPERCRITICAL AQUEOUS SOLUTIONS OF SODIUM CHLORIDE
SUPERCRITICAL AQUEOUS SOLUTIONS OF SODIUM CHLORIDE

HOOKE`S LAW AND SIhlPLE HARMONIC MOTION BY DR
HOOKE`S LAW AND SIhlPLE HARMONIC MOTION BY DR

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Atomic theory



In chemistry and physics, atomic theory is a scientific theory of the nature of matter, which states that matter is composed of discrete units called atoms. It began as a philosophical concept in ancient Greece and entered the scientific mainstream in the early 19th century when discoveries in the field of chemistry showed that matter did indeed behave as if it were made up of atoms.The word atom comes from the Ancient Greek adjective atomos, meaning ""uncuttable"". 19th century chemists began using the term in connection with the growing number of irreducible chemical elements. While seemingly apropos, around the turn of the 20th century, through various experiments with electromagnetism and radioactivity, physicists discovered that the so-called ""uncuttable atom"" was actually a conglomerate of various subatomic particles (chiefly, electrons, protons and neutrons) which can exist separately from each other. In fact, in certain extreme environments, such as neutron stars, extreme temperature and pressure prevents atoms from existing at all. Since atoms were found to be divisible, physicists later invented the term ""elementary particles"" to describe the ""uncuttable"", though not indestructible, parts of an atom. The field of science which studies subatomic particles is particle physics, and it is in this field that physicists hope to discover the true fundamental nature of matter.
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