About: Dimensionless physical constant

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In physics, a dimensionless physical constant is a physical constant that is dimensionless, i.e. a pure number having no units attached and having a numerical value that is independent of whatever system of units may be used.For example, if one considers one particular airfoil, the Reynolds number value of the laminar–turbulent transition is one relevant dimensionless physical constant of the problem. However, it is strictly related to the particular problem: for example, it is related to the airfoil being considered and also to the type of fluid in which it moves.

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rdf:type	yago:Abstraction100002137 yago:Cognition100023271 yago:Concept105835747 yago:Constant105858936 yago:Content105809192 yago:Idea105833840 yago:PsychologicalFeature100023100 yago:Quantity105855125 yago:WikicatFundamentalConstants yago:WikicatPhysicalConstants
rdfs:label	ثابت عديم الأبعاد (ar) Constant física fonamental (ca) Constante física fundamental (es) Dimensionless physical constant (en) Tairisigh bhunúsacha (ga) Constante fondamentale (fr) Constante fundamental (pt)
rdfs:comment	الثابت عديم الأبعاد في الفيزياء ثابت فيزيائي بلا أبعاد، أي عدد ليس له وحدات مرتبطة وله قيمة عددية مستقلة عن أي نظام من الوحدات يمكن استخدامه. * بوابة الفيزياء (ar) Una constant física fonamental és una constant física adimensional i que per tant pren el mateix valor en qualsevol sistema d'unitats. Això fa d'aquestes constants físiques les úniques constants estrictament universals. (ca) En physique, la notion de constante fondamentale désigne une grandeur fixe, intervenant dans les équations de la physique, qui ne peut pas être déterminée par une théorie sous-jacente dont les équations seraient un cas limite ou une théorie effective. C'est donc un statut provisoire, car il se peut qu'une théorie plus fondamentale apparaisse qui permette la détermination d'une constante « fondamentale » pour un certain niveau de théorie effective. (fr) Una constante física fundamental es una constante física adimensional y que por tanto toma el mismo valor en cualquier sistema de unidades. Eso hace de estas constantes físicas las únicas constantes estrictamente universales (aunque a veces se aplica el término constante fundamental a constantes físicas que no son estrictamente universales y dependen del tipo de sistema de unidades elegidas). (es) Sraith cainníochtaí uimhriúla a mbíonn luach tairiseach ag gach ceann acu, is cuma cén breathnadóir atá i gceist. Cinneann na tairisigh seo an-chuid cainníochtaí eile i réimsí go léir na heolaíochta. Glactar mar thairisigh bhunúsacha tairiseach Planck, luas forleata an tsolais, an tairseach imtharraingthe, tairiseach uilíoch na ngás, uimhir Avogadro, lucht an leictreoin, ceadaíocht folúis, tréscaoilteacht folúis, agus maiseanna áirithe cáithníní. (ga) In physics, a dimensionless physical constant is a physical constant that is dimensionless, i.e. a pure number having no units attached and having a numerical value that is independent of whatever system of units may be used.For example, if one considers one particular airfoil, the Reynolds number value of the laminar–turbulent transition is one relevant dimensionless physical constant of the problem. However, it is strictly related to the particular problem: for example, it is related to the airfoil being considered and also to the type of fluid in which it moves. (en) Em Física, uma constante fundamental é, no sentido restrito do termo, uma constante física independente do sistema de unidades, sendo assim um número sem dimensão. Isso faz destas constantes físicas as únicas constantes estritamente universais (ainda que às vezes se aplica o termo constante fundamental a constantes físicas que não são estritamente universais e dependem do tipo de sistema de unidades escolhidas). No entanto, o termo também pode ser usado (por exemplo, pelo NIST) para se referir a qualquer constante física universal com dimensão, como a Constante gravitacional. (pt)
dcterms:subject	Fundamental constants
Wikipage page ID	458565 (xsd:integer)
Wikipage revision ID	1122983086 (xsd:integer)
Link from a Wikipage to another Wikipage	Cabibbo–Kobayashi–Maskawa matrix Princeton University Press Proton Proton–proton chain reaction Quark Metrology Baryonic matter Bottom quark Anthropic principle Reynolds number Richard Feynman Universe Up quark Electroweak Proton-to-electron mass ratio Quantum physics Committee on Data for Science and Technology Cosmological constant Cosmology Coupling constant Mass Yoshio Koide Electromagnetic force Electron Electron rest mass Elementary charge Elementary particle Elsevier Friedmann equations Fundamental particle Gravitation Gravitational constant Vacuum permittivity Lepton London Standard Model Standard model Strange quark Z boson Fundamental interaction Particle physics Physics 1970s Top quark W boson Weidenfeld & Nicolson Weinberg angle Helium Laminar–turbulent transition Age of the universe Airfoil Albert Einstein Amsterdam Dark energy Down quark Expansion of the universe Fine-structure constant Fine-tuned universe Fine structure constant Nuclear fusion Oxford University Press Dimensionless numbers in fluid mechanics Dirac large numbers hypothesis Koide formula Critical density (cosmology) Physical constant Physical cosmology Supercluster Pauli exclusion principle Higgs boson Astrophysics Teleology Hyperspace (book)

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