Physics Exercises/Fundamental Constants

Physics Study Guide/Physics constants Table of Constants +Fundamental constants from NIST Physics LabNameSymbolValueUnitsRelative UncertaintySpeed of light (in vacuum)(exact)Magnetic constant(exact)Electric constant(exact)Newtonian gravitational constantPlank's constantElementary chargeMass of the electronMass of the protonMass of a neutronFine structure constantdimentionlessMolar gass constantBoltzmann's constantAvogadro's numberRydberg constantAtmosphere(exact)ElectronvoltBohr radiusCoulomb's constantFaraday constantGravitational acceleration on EarthMass of the EarthMass of the MoonMean radius of the EarthMean radius of the MoonDirac's ConstantSpeed of sound in air at STPUnified Atomic Mass UnitVacuum Permittivity 1 Atmosphere Pressure (1 atm) : 1.0 × 105 N/m2 = 1.0 × 105 Pa 1 Electron Volt (1 eV) : 1.60 × 10−19 J Bohr radius (a0) : 5.292 × 10−11 m Coulomb's Law Constant (k) : 1/(4 π ε0) = 9.0 × 109 N·m2/C2 Faraday constant (F) : 96,485 C·mol−1 Gravitational accelaration (g) : 9.80665 m·s-2 Mass of a neutron (mn) : 1.67495 × 10−27 kg Mass of Earth : 5.98 × 1024 kg Mass of the Moon : 7.35 × 1022 kg Mean radius of Earth : 6.37 × 106 m Mean radius of the Moon : 1.74 × 106 m Dirac's Constant () : = 1.05457148 × 10−34 J·s Speed of sound in air at STP : 3.31 × 102 m/s Unified Atomic Mass Unit (u) : 1.66 × 10−27 kg Vacuum Permittivity (ε0) : 8.85 × 10−12 C2/(N·m2) Item Proton Neutron Electron Mass 1 1 Negligible Charge +1 0 -1 Spin See Also Wiki-links Wikipedia Article External Links NIST Physics Lab id:Daftar konstante fisika