12Why does fiber glass not shrink as much as a pure plastic on cooling?A. It has no plastic in itB. Glass shrinks very littleC. It is magicTensile StressYield StressReduction in AreaElongationAnnealed3Heat FlowThermal Conductivity4Electrons as a Ideal GasandbutWiedemann-Franz-Lorentz LawWith quantum treatmentReal values agreeLorenz number in 10^-8 Watt ohm/K^2Metal 273K 373KAg 2.31 2.37Au 2.35 2.40Cd 2.42 2.43Cu 2.23 2.33Ir 2.49 2.495MoremetalsMo 2.61 2.79Pb 2.47 2.56Pt 2.51 2.60Sn 2.52 2.49W 3.04 3.20Zn 2.31 2.33The Wiedemann-Franz-Lorentz works becauseA. Heat and electrical current are carried by the same objects in many materialsB. On a quantum level, everything is the sameC. The mechanism for impeding heat and electrical currents are the same in many
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