@prefix isq: <https://w3id.org/standards/isq/ontologies/core/> .
@prefix smart: <https://example.org/smart-sdu/> .
@prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .
@prefix dcterms: <http://purl.org/dc/terms/> .
@prefix skos: <http://www.w3.org/2004/02/skos/core#> .

<isq:t11-8.4>
  a isq:Entry ;
  rdf:type isq:Quantity ;
  rdf:type smart:TermEntry ;
  dcterms:identifier "11-8.4" ;
  skosxl:prefLabel "Alfvén number"@en ;
  skosxl:altLabel "Mach magnetic number"@en ;
  skosxl:altLabel "Kárman number"@en ;
  skosxl:altLabel "Al"@en ;
  skos:definition "relation between speed of a plasma and the Alfvén wave speed, expressed by\n\nstem:[Al = v/(B//sqrt(rho mu))]; where\n\nstem:[v]:: is speed (<<iso80000-3>>),\nstem:[B]:: is magnetic flux density (<<iec80000-6>>),\nstem:[rho]:: is mass density (<<iso80000-4>>), and\nstem:[mu]:: is magnetic permeability (<<iec80000-6>>)\n"@en ;
  smart:hasBindingnessType "bindingness-type:normative" ;
  dcterms:isPartOf <isq:part-11> ;
  skos:note "Often, the inverse of this number is wrongly used.\n\nThe name \"Alfvén Mach number\" is used in investigations on the solar wind.\n\nThe quantity stem:[v_\"A\"=B//sqrt(rho mu)] is called Alfvén wave speed, where\n\nstem:[B]:: is magnetic flux density (<<iec80000-6>>),\nstem:[rho]:: is mass density (<<iso80000-4>>), and\nstem:[mu]:: is magnetic permeability (<<iec80000-6>>).\n"@en ;
  iso:urn <urn:iso:std:iso:80000:-11:ed-2:en:item:11-8.4> .