Physical Constants _ Physics

Physical quantity Chinese symbol value Unit Speed of light in vacuum vacuum light c 2.99 792 458x10^8 m/permittivity of free spaces vacuum capacitance rate ε0 1∕μ0 C2 =8.85 4 187 817...x10^-12 m^-1 permeability of free spaces vacuum permeability μ0 4πx10-7-12.566 370 ... 614 x10^-7 ^-2 gravitational gravity Number G 6.673 (a) x10^-11 m^3kg^-1s^-2 Planck constant Planck constant H 6.626 068 () x10^-34 J s reduced Planck-constant reduction of Planck constant Ћ h∕2π=1.054 571 596 (d) X10^-34 J s elementary charge basic charge e 1.602 176 () 462 C x10^-19 Magnetic flux magnetic flux quantum φ0 (2 e) =2.067 833 636 (Bayi) x10^-15 Wb electron mass electronic quality me 9.109 381 (a) x10^-31 kg Proton the proton quality   1.672 621 58 (1 3) x10^-27 kg neutron mass neutron mass   1.674 927 () x10^-27 kg Compton wavelength electron compton wavelength λc h∕me c = 2.426 31 0 215 () x10^-12 m fine-structure constant fine structure constant αμ0 ce2∕2 h =7.297 352 (a) x10^-3   Bohr Magneton wave Ear Magnets Μb e?∕2 me 5.788 381 749 ($) x10-11 MeV t^-1 Bohr radius ear radius a∞4πε0?2∕me e2= reα-2 0.529 177 3 () x10^-10 m Rydb ERG constant Reider HODGINSII constant r∞mECΑ2∕2H 973 731.568 549 (km) m^-1 Avogadro constant sub-Buddha add Jue constant N A 6.022 (k) x1023 mol^-1 Faraday constant Faraday constant F n ae 96 485.3415 (m) C mol^-1 Universal gas constant gaseous constant R 8.314 472 (m) J mol-1 k^-1 Boltzmann constant Boltzmann constant KB R∕ NA =1.380 650 3 x10-23 J k^-1 Stefan-boltzmann constant Stefan-Boltzmann constant σ (π2∕60) k4∕?3c2=5.670 () x10^-8 W m^-2 k^-4 E Lectron Volt EV 1.602 176 462 (a) x10^-19 J Atomic mass unit atomic mass unit AMU 1.660 538 () x10^-27 kg Standard RE standard atmospheric ATM 325 Pa astronomical unit au 149 597 870 660 (M parsec second gap pc 3.085 677 580 7 (4) x1016 m Light Year Light-years ly 0.946 1...x1016 m