1% List of physical constants 2% Thomas Helfer 3% 2017 4 5\newcommand{\mol}{\mathrm{mol}} 6 7Various physical constants now available. The values are extracted from: <http://physics.nist.gov/cuu/Constants/index.htm> 8 9| Symbol | Description | Value | Unit | 10|-----------+---------------------------+------------------------------+------------------------| 11| \(\mu\) | Atomic mass constant | \(1.660539040\,.10^{-27}\) | \(kg\) | 12| \(N_{a}\) | Avogadro constant | \(6.022140857\,.10^{23}\) | \(\mol^{-1}\) | 13| \(k_{b}\) | Boltzmann constant | \(1.38064852\,.10^{-23} \) | \(J.K^{-1}\) | 14| \(G_{0}\) | Conductance quantum | \(7.7480917310\,.10^{-5}\) | \(S\) | 15| \(e_{0}\) | Electric constant | \(8.854187817\,.10^{-12}\) | \(F.m^{-1}\) | 16| \(m_{e}\) | Electron mass | \(9.10938356\,.10^{-31} \) | \(kg\) | 17| \(eV\) | Electron volt | \(1.6021766208\,.10^{-19}\) | \(J\) | 18| \(e\) | Elementary charge | \(1.6021766208\,.10^{-19}\) | \(C\) | 19| \(F\) | Faraday constant | \(96485.33289\) | \(C.\mol^{-1}\) | 20| \(a\) | Fine-structure constant | \(7.2973525664\,.10^{-3}\) | | 21| \(R\) | Molar gas constant | \(8.3144598\) | \(J.\mol^{-1}.K^{-1}\) | 22| \(s\) | Stefan-Boltzmann constant | \(5.670367\,.10^{-8}\) | \(W.m^{-2}.K^{-4}\) | 23 24# `C++` 25 26The physical constants are available as constexpr static members of 27`tfel::PhysicalConstants` class defined in the 28`TFEL/PhysicalConstants.hxx` header. 29 30~~~~{.cpp} 31using Cste = tfel::PhysicalConstants<real>; 32const auto R = Cste::R; 33~~~~ 34 35# `Python` 36 37The physical constants are available as members of the 38`tfel.PhysicalConstants` class, as follows: 39 40~~~~{.python} 41from tfel import PhysicalConstants as Cste 42print(Cste.Na) 43~~~~ 44