Physics Study Guide/Physics constants

Commonly Used Physical Constants +Uncertainty should be read as 1.234(56) = 1.2340.056NameSymbolValueUnitsRelative UncertaintySpeed of light (in vacuum)(exact)Magnetic Constant(exact)Electric Constant(exact)Newtonian Gravitaional ConstantPlank's ConstantElementary chargeMass of the electronMass of the protonFine structure constantdimensionlessMolar gass constantBoltzmann's constantAvogadro's NumberRydberg constantStandard acceleration of gravitydefinedAtmospheric pressuredefinedBohr RadiusElectron VoltLuminous efficacy of monochromatic radiation(exact)hyperfine transition frequency of Cs-133(exact)Reduced Planck constant(exact)atomic mass of Carbon 12molar mass of Carbon-12atomic mass constantmolar mass constantmolar volume of siliconmolar Planck constantStefan-Boltzmann constantfirst radiation constantfirst radiation constant for spectral radiancefirst radiation constant for spectral radiance https://physics.nist.gov/cgi-bin/cuu/Value?eqc1l NIST.gov NIST 5 June 2022second radiation constantWien wavelength displacement constantWien frequency displacement constantWien entropy displacement constantFaraday constantFaraday constant https://physics.nist.gov/cgi-bin/cuu/Value?eqf NIST.gov NIST 5 June 2022 __TOC__ To Be Merged Into Table This list is prepared in the format Constant (symbol) : value Coulomb's Law Constant (k) : 1/(4 π ε0) = 9.0 × 109 N·m2/C2 Faraday constant (F) : 96,485 C·mol−1 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 ItemProtonNeutronElectronMass11NegligibleCharge+10-1 See Also Wiki-links Wikipedia Article External Links NIST Physics Lab