# https://physics.nist.gov/cgi-bin/cuu/Category?view=html&Frequently+used+constants.x=55&Frequently+used+constants.y=9

assert_eq(m_u, 1.660_539_066_60e-27 kg)
assert_eq(N_A, 6.022_140_76e23 mol^-1)
assert_eq(k_B, 1.380_649e-23 J/K)
assert_eq(conductance_quantum, 7.748_091_729e-5 S, 1e-14 S)
assert_eq(electron_mass, 9.109_383_7015e-31 kg)
assert_eq(1 eV, 1.602_176_634e-19 J)
assert_eq(electron_charge,  1.602_176_634e-19 C)
assert_eq(faraday_constant, 96_485.332_12 C mol^-1, 1e-5 C mol^-1)
assert_eq(α, 7.297_352_5693e-3, 1e-13)
assert_eq(josephson_constant, 483_597.848_4e9 Hz V^-1, 1e5 Hz V^-1)
assert_eq(magnetic_flux_quantum,  2.067_833_848e-15 Wb, 1e-24 Wb)
assert_eq(gas_constant,  8.314_462_618 J mol^-1 K^-1, 1e-9 J mol^-1 K^-1)
assert_eq(G, 6.674_30e-11 m^3 kg^-1 s^-2)
assert_eq(planck_constant, 6.626_070_15e-34 J Hz^-1)
assert_eq(proton_mass, 1.672_621_923_69e-27 kg)
assert_eq(stefan_boltzmann_constant, 5.670_374_419e-8 W m^-2 K^-4, 1e-17 W m^-2 K^-4)
assert_eq(eps0, 8.854_187_8128e-12 F m^-1, 1e-24 F m^-1)
assert_eq(mu0, 1.256_637_062_12e-6 N A^-2)
assert_eq(von_klitzing_constant, 25_812.807_45 Ω, 1e-5 Ω)