{ "items" : [
    { "id" : "http://dbpedia.org/resource/Mass_flux"
      "properties" : {
        "http://www.w3.org/2000/01/rdf-schema#comment" : [ "In physics and engineering, mass flux is the rate of mass flow per unit area, perfectly overlapping with the momentum density, the momentum per unit volume. The common symbols are j, J, q, Q, φ, or Φ (Greek lower or capital Phi), sometimes with subscript m to indicate mass is the flowing quantity. Its SI units are kg s−1 m−2."] } } }
