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Header Region - RF Cafe Sub-Header - RF Cafe # All Physical Constants

This is a very comprehensive list of most physical constants needed to perform routine (and some not-so-routine) tasks. Oddly enough (and scarily enough), a search on the Internet, and printed texts as well, will turn up sometimes significantly different values for these "constants."

As with all endeavors of importance, you are advised to collaborate the values presented here with a second source that you trust.

 Name Value Unit -A- Absolute Entropy Constant -1.1517048 Absolute Entropy Constant -1.1648678 Absolute Zero -273.15 °C Acceleration of Free Fall on Earth 9.80665 m/s^2 Acceleration of Free Fall on Earth 32.174 ft/s^2 Acre 4046.856422 m^2 Air Density 1.2929 kg/m^3 Air Viscosity @ (20°C) 0.000018 N s/m^2 Alladi-Grinstead Constant 0.809394021 Ångström 1E-10 m Année-lumière ly 9.46053E+15 m Apéry's Constant 1.202056903 Apothecaries' Ounce 0.031103477 kg Astronomical Unit AU 1.49598E+11 m Atmospheric Pressure 101325 N/m^2 Atmospheric Pressure 1.01325 bar Atmospheric Pressure 14.7 lbf/in^2 Atomic Mass Unit 1.66054E-27 kg Atomic Mass Unit 931.494013 MeV Atomic Mass Unit 1.49242E-10 J Avogadro Constant NA 6.02214E+23 mol-1 Avoirdupois Ounce oz 0.028349523 kg Avoirdupois Ounce oz 0.0625 lb (av.) Avoirdupois Ounce oz 16 drachms (av.) -B- Backhouse's Constant 1.456074949 Base of Natural Logarithms 2.718281828 Bernstein's Constant 0.280169499 Board Foot (Timber) 0.002359737 m^3 Bohr Magneton 9.27401E-24 J/T Bohr Magneton 5.78838E-05 eV/T Bohr Magneton 13996246240 Hz/T Bohr Radius 5.29177E-11 m Boltzmann Constant 1.38065E-23 J/K Boltzmann Constant 8.61734E-05 eV/K Boltzmann Constant 20836644000 Hz/K Briggsian logarithm log10(2) 0.301029996 Brun's Constant B 1.902160582 -C- Cahen's Constant 0.62946502 Carbon-14 Half-life of T 5570 years Catalan's Constant 0.915965594 Chain 20.1168 m Characteristic Impedence of Vacuum 376.7303135 Ohm Charge to Mass Quotient(Electron) -1.75882E+11 C/kg Charge to Mass Quotient (Proton) 95788340.8 C/kg Charge (Electron) 1.60218E-19 C Charge (Electron) 2.41799E+14 A/J Charge (Electron Specific) -1.75882E+11 C/kg Charge (Elementary) 1.60218E-19 C Charge (Elementary) 2.41799E+14 A/J Circulation (Quantum) 0.000363695 m2/s Circulation (Quantum) 0.00072739 m2/s Classical Electron Radius 2.81794E-15 m Common Logarithm of 2 log10(2) 0.301029996 Compton Wavelength of Electron 2.42631E-12 m Compton Wavelength (Muon ) 1.17344E-14 m Compton Wavelength (Neutron) 1.31959E-15 m Compton Wavelength (Proton) 1.32141E-15 m Compton Wavelength (Tau) 6.977E-16 m Conductance Quantum 7.74809E-05 S Conductance (Quantized Hall) 3.87405E-05 S Copper (Linear Expansivity) 0.000017 K-1 Copper (Specific Heat Capacity) 385 J kg-1 K-1 Copper (Thermal Conductivity) 385 W/m/K Copper (Young Modulus) 1.3E+11 Pa Cord (Timber UK) 3.624556364 m^3 Critical Temperature of Air -190 °C Cross Section (Thomson) 6.65246E-29 m^2 Cube Foot 0.028316847 m^3 Cube Inch 1.63871E-05 m^3 Cube Yard 7.64555E-05 m^3 Curie 37000000000 Bq -D- Dalton 1.66054E-27 kg Dalton 931.494013 MeV Dalton 1.49242E-10 J Daniel Cell (emf) 1.08 V Density of Air (at stp) 0.7734 m^3/kg Density of Air (at stp) 1.2929 kg/m^3 Density (Earth's Average) 5517 kg/m^3 Deuteron Magnetic Moment 4.33074E-27 J/T Deuteron Magnetic Moment 0.000466975 µB Deuteron Magnetic Moment 0.85743823 µN Deuteron Molar Mass 2.013553214 u Deuteron Rest Mass 3.34359E-27 kg Deuteron Rest Mass 2.013553214 u Deuteron Rest Mass 1875.61339 MeV/c^2 Deuteron-Electron Magnetic Moment Ratio 0.000466435 Deuteron-Electron Rest Mass Ratio 3670.483014 Deuteron-Proton Magnetic Moment Ratio 0.307012204 Deuteron-Proton Rest Mass Ratio 1.999007496 Dirac's Constant 1.05457E-34 J s Dirac's Constant 6.58212E-16 eV s Drachm (Avoirdupois) 0.001771845 kg Dry Pint (US) 0.00055061 m^3 -E- e 2.718281828 Earth's Average Density 5517 kg/m^3 Earth's Average Radius 6370000 m Earth's Magnetic Field (Horizontal Component) 0.000018 T Earth's Mass 5.972E+24 kg Earth-Moon Mean Distance 384400000 m Electric Constant 8.85419E-12 F/m Electron Charge 1.60218E-19 C Electron Charge 2.41799E+14 A/J Electron Charge to Mass Quotient -1.75882E+11 C/kg Electron g-Factor -2.002319304 Electron Gyromagnetic Ratio 1.76086E+11 s-1 T-1 Electron Gyromagnetic Ratio 28024.954 MHz/T Electron Magnetic Moment -9.28476E-24 J/T Electron Magnetic Moment -1.001159652 Electron Magnetic Moment -1838.281966 Electron Magnetic Moment Anomaly 0.001159652 Electron Mass 9.10938E-31 kg Electron Mass 0.00054858 u Electron Mass 0.510998902 MeV Electron Molar Mass 5.4858E-07 kg/mol Electron Radius (Classical) 2.81794E-15 m Electron Specific Charge -1.75882E+11 C/kg Electron to Shielded Helion Magnetic Moment Ratio (gas sphere 25°C) 864.058255 Electron to Shielded Proton Magnetic Moment Ratio (H2O sphere 25°C) -658.2275954 Electron-a-Particle Mass Ratio 0.000137093 Electron-Deuteron Magnetic Moment Ratio -2143.923498 Electron-Deuteron Mass Ratio 0.000272444 Electron-Muon Magnetic Moment Ratio 206.766972 Electron-Muon Mass Ratio 0.004836332 Electron-Neutron Magnetic Moment Ratio 960.9205 Electron-Neutron Mass Ratio 0.000543867 Electron-Proton Magnetic Moment Ratio -658.2106875 Electron-Proton Mass Ratio 0.000544617 Electron-Tau Mass Ratio 0.000287555 Electronvolt 1.60218E-19 J Elementary Charge 1.60218E-19 C Elementary Charge 2.41799E+14 A/J emf of Daniell Cell 1.08 V emf of Lechlanché Cell 1.46 V emf of Nife Cell 1.4 V emf of Weston Cell 1.0186 V Energy Production (Sun's) 3.9E+26 W Energy (Hartree) 4.35974E-18 J Energy (Hartree) 27.2113834 eV Euler's Constant 0.577215665 -F- Faraday Constant 96485.3415 C/mol Fathom fath 1.8288 m Fathom fath 72 in Fathom fath 6 ft Feigenbaum's Constant 4.669210609 Fermi Constant 1.4E-50 J m-3 Fermi Coupling Constant 1.16639E-05 GeV-2 Fine Structure Constant 0.007297353 First Radiation Constant 3.74177E-16 W m2 First Radiation Constant for Spectral Radiance 1.19104E-16 W m^2/sr Fluid Ounce UK 0.00002841 m^3 Fluid Ounce US 0.00002957 m^3 Foot 0.3048 m Foot (Board Timber) 0.002359737 m^3 Foot (Cube) 0.028316847 m^3 Foot (Cube) 1728 in^3 Fransén-Robinson Constant 2.807770242 Free Neutron (Half-life) 650 s Free Space (Permeability) 1.25664E-06 N/A^2 Free Space (Permittivity) 8.85419E-12 F/m -G- g-Factor (Electron) -2.002319304 g-Factor (Muon) -2.002331832 g-Factor (Neutron) -3.82608545 g-Factor (Proton) 5.585694675 Gallon (UK) 0.004546 m^3 Gallon (UK) 1.201 US gallon Gallon (US) 0.003785 m^3 Gallon (US) 0.833 UK gallon Gas Constant 8.314 J K-1 mol-1 Gas Constant 8.314472 J mol-1 K-1 Geepound 14.59390294 kg Glass (Refractive Index) 1.5 Glass (Thermal Conductivity) 1 W m-1 K-1 Gold Number 1.618033989 Golden Mean 1.618033989 Golomb-Dickman Constant 0.624329989 Grain 0.06479 g Gravitation (Newtonian Constant) 6.673E-11 m^3 kg-1 s-1 G/hc 6.707E-39 (GeV/c2)-2 Gravitational Acceleration (Moon's) 1.619 m s-2 Gravitational Constant 6.673E-11 N m^2 kg-2 Gravity (Acceleration) 9.80665 m s-2 Gravity (Acceleration) 32.174 ft s-2 Gunter's Chain 20.1168 m Gyromagnetic Ratio (Electron) 1.76086E+11 s-1 T-1 Gyromagnetic Ratio (Electron) 28024.954 MHz T-1 Gyromagnetic Ratio (Neutron) 183247188 s-1 T-1 Gyromagnetic Ratio (n/2p) 29.1646958 MHz T-1 Gyromagnetic Ratio (Proton) 267522212 m s-1 T-1 Gyromagnetic Ratio (Proton) 42.5774825 MHz T-1 Gyromagnetic Ratio (Shielded Proton H2O sphere 25°C) 267515341 /s/T -H- Hafner-Sarnak-McCurley Constant 0.353236372 Half-life of Carbon-14 5570 years Half-life of Free Neutron 650 s Hard Square Entropy Constant 1.503048082 Hartree Energy 4.35974E-18 J Hartree Energy 27.2113834 eV Hectare 104 m^2 Horizontal Component of Earth's Magnetic Field 0.000018 T Hundredweight (UK) 50800 g Hundredweight (Short US) 45350 g Hydrogen Rydberg Number 10967758 m-1 -I- Impedence of Vacuum Z0 376.7303135 Ohm Imperial Pint 0.0005682 m^3 Inch 0.254 m Inch (Cube) 1.63871E-05 m^3 International Nautical Mile 1852 m Inverse Conductance Quantum 12906.403786 Ohm Inverse Fine Structure Constant 0.137036 -J- Josephson Frequency-Voltage Quotient 4.83598E+14 Hz/V -K- Khintchine's Constant 2.685452001 -L- Landau-Ramanujan Constant 0.764223653 Laplace Limit Constant 0.662743419 Lechlanché Cell (emf) 1.46 V Length (Planck) 1.616E-35 m Lengyel's Constant 1.098685806 Lieb's Square Ice Constant 1.539600718 Light Year 9.46053E+15 m Light Speed of (in a Vacuum) 299792458 m/s Linear Expansivity of Copper 0.000017 K-1 Linear Expansivity of Steel 0.000012 K-1 Liquid Pint (US) 0.0004731 m^3 Litre 0.001 m^3 Loschmidt Constant 2.68678E+25 m-3 Loschmidt Constant (T=273.15K; p=100kPa) 0.022710981 m^3/mol -M- Madelung's Constant -1.615542627 Magnetic Constant 1.25664E-06 N A-2 Magnetic Flux Quantum 2.06783E-15 Wb Magnetic Moment Anomaly (Electron) 0.001159652 Magnetic Moment Anomaly (Muon) 0.001165916 Magnetic Moment Ratio (Deuteron-Electron) 0.000466435 Magnetic Moment Ratio (Deuteron-Proton) 0.3070122035(51) Magnetic Moment Ratio (Electron to Shielded Helion gas sphere 25°C) 864.058255(10) Magnetic Moment Ratio (Electron to Shielded Proton H2O sphere 25°C) -658.2275954(71) Magnetic Moment Ratio (Electron-Deuteron) -2143.923498 Magnetic Moment Ratio (Electron-Muon) 206.766972 Magnetic Moment Ratio (Electron-Neutron) 960.9205 Magnetic Moment Ratio (Electron-Proton) -658.2106875 Magnetic Moment Ratio (Muon-Proton) -3.18334539 Magnetic Moment Ratio (Neutron to Shielded Proton H2O- sphere- 25°C) -0.68499694(16) Magnetic Moment Ratio (Neutron-Electron) 0.001040669 Magnetic Moment Ratio (Neutron-Proton) -0.68497934 Magnetic Moment Ratio (Proton-Neutron) -1.45989805 Magnetic Moment (Deuteron) 0.43307375(15)e-26 J/T Magnetic Moment (Deuteron) 0.000466975 µB Magnetic Moment (Deuteron) 0.85743823 µN Magnetic Moment (Electron µe) -9.28476E-24 J/T Magnetic Moment (Electron µe/µB) -1.001159652 Magnetic Moment (Electron µe/µN) -1838.281966 Magnetic Moment (Muon µµ) -4.49045E-26 J/T Magnetic Moment (Muon µµ/µB) -0.004841971 Magnetic Moment (Muon µµ/µN) -8.8905977 Magnetic Moment (Neutron µn) -9.66236E-27 J/T Magnetic Moment (Neutron µn/µB0 -0.001041876 Magnetic Moment (Neutron µn/µN) -1.91304272 Magnetic Moment (Proton µp) 1.41061E-26 J/T Magnetic Moment (Proton µp/µB) 0.001521032 Magnetic Moment (Proton µp/µN) 2.792847337 Magneton (Bohr) 9.27401E-24 J/T Magneton (Bohr) 5.78838E-05 eV/T Magneton (Bohr) 13996246240 Hz/T Magneton (Nuclear) 5.05078E-27 J/T Magneton (Nuclear) 3.15245E-08 eV/T Magneton (Nuclear) 7.62259396 MHz/T Mass Ratio (Deuteron-Electron Rest) 3670.483014 Mass Ratio (Deuteron-Proton Rest) 1.999007496 Mass Ratio (Electron-a-Particle) 0.000137093 Mass Ratio (Electron-Deuteron) 0.000272444 Mass Ratio (Electron-Muon) 0.004836332 Mass Ratio (Electron-Neutron) 0.000543867 Mass Ratio (Electron-Proton) 0.000544617 Mass Ratio (Electron-Tau) 0.000287555 Mass Ratio (Muon-Electron) 206.7682657 Mass Ratio (Muon-Neutron) 0.112454508 Mass Ratio (Muon-Proton) 0.112609517 Mass Ratio (Muon-Tau) 0.0594572 Mass Ratio (Neutron-Electron) 1.838683655 Mass Ratio (Neutron-Muon) 8.89248478 Mass Ratio (Neutron-Proton) 1.001378419 Mass Ratio (Neutron-Tau) 0.528722 Mass Ratio (Proton-Electron) 1836.152668 Mass Ratio (Proton-Muon) 8.88024408 Mass Ratio (Proton-Neutron) 0.998623479 Mass Ratio (Proton-Tau) 0.527994 Mass Ratio (Tau-Electron) 3477.48 Mass Ratio (Tau-Muon) 16.8188 Mass Ratio (Tau-Neutron) 1.89135 Mass Ratio (Tau-Proton) 1.89396 Mass (Deuteron Rest) 3.34359E+27 kg Mass (Deuteron Rest) 2.013553214 u Mass (Deuteron Rest) 1875.61339 MeV/c^2 Mass (Earth's) 5.972E+24 kg Mass (Sun's) 1.99E+30 kg Mass (Tau) 3.16788E-27 kg Mass (Tau) 1.90774 u Mile 1609.344 m Mile (Square) 2589000 m^2 Mills' Constant 1.306377884 Molar Gas Constant 8.314472 J mol-1 K-1 Molar Mass (Deuteron) 2.013553214 u Molar Mass (Electron) 5.4858E-07 kg/mol Molar Mass (Muon) 0.000113429 kg/mol Molar Mass (Neutron) 0.001008665 kg/mol Molar Mass (Proton) 0.001007276 kg/mol Molar Mass (Tau NAmt) 0.00190774 kg/mol Molar Planck Constant 3.99031E-10 J s/mol Molar Planck Constant 0.119626565 J m/mol Molar Volume (Ideal Gas T=273.15 K p=101.325 kPa) 0.022413996 m^3 mol-1 Moon's Gravitational Acceleration 1.619 m/s^2 Moon's Mean Density 3330 kg/m^3 Moon's Mean Distance from Earth 384400000 m Moon's Mean Mass 7.33E+22 kg Moon's Mean Radius 1738000 m Muon Compton Wavelength 1.17344E-14 m Muon g-Factor -2.002331832 Muon Magnetic Moment -4.49045E-26 J/T Muon Magnetic Moment -0.004841971 Muon Magnetic Moment -8.8905977 Muon Magnetic Moment Anomaly 0.001165916 Muon Mass 1.88353E-28 kg Muon Mass 0.113428917 u Muon Mass 105.6583568 MeV Muon Molar Mass 0.000113429 kg/mol Muon-Electron Mass Ratio 206.7682657 Muon-Neutron Mass Ratio 0.112454508 Muon-Proton Magnetic Moment Ratio -3.18334539 Muon-Proton Mass Ratio 0.112609517 Muon-Tau Mass Ratio 0.0594572 -N- Naperian (natural) logarithm ln(10) 2.302585093 Naperian (natural) logarithm ln(2) 0.693147181 Nautical Mile (International) 1852 m Nautical Mile (UK) 1853.18 m Neutron Compton Wavelength 1.31959E-15 m Neutron g-Factor -3.82608545 Neutron Gyromagnetic Ratio 183247188 /s/T Neutron Gyromagnetic Ratio 29.1646958 MHz/T Neutron Magnetic Moment -9.66236E-27 J/T Neutron Magnetic Moment -0.001041876 Neutron Magnetic Moment -1.91304272 Neutron Mass 1.67493E-27 kg Neutron Mass 1.008664916 u Neutron Mass 1.50535E-10 J Neutron Molar Mass 0.001008665 kg/mol Neutron to Shielded Proton Magnetic Moment Ratio (H2O- sphere- 25°C) -0.68499694 Neutron-Electron Magnetic Moment Ratio 0.001040669 Neutron-Electron Mass Ratio 1.838683655 Neutron-Muon Mass Ratio 8.89248478 Neutron-Proton Magnetic Moment Ratio -0.68497934 Neutron-Proton Mass Ratio 1.001378419 Neutron-Tau Mass Ratio 0.528722 Newtonian Constant of Gravitation 6.673E-11 m^3 kg-1 s-1 Newtonian Constant of Gravitation 6.707E-39 (GeV/c2)-2 Nife Cell (emf) 1.4 V Niven's Constant 1.70521114 Nuclear Magneton 5.05078E-27 J T-1 Nuclear Magneton 3.15245E-08 eV T-1 Nuclear Magneton 7.62259396 MHz T-1 Number (Gold) 1.618033989 -O- Ounce (Apothecaries) 0.031103477 kg Ounce (Avoirdupois) 0.028349523 kg Ounce (Avoirdupois) 0.0625 lb (av.) Ounce (Avoirdupois) 16 drachms (av.) Ounce (Troy) 31.103 g -P- Paraffin (Refractive Index) 1.42 Permeability of Free Space 1.25664E-06 H/m Permittivity of Free Space 8.85419E-12 F/m Pi 3.141592654 Pint (Dry US) 0.00055061 m^3 Pint (Imperial) 0.0005682 m^3 Pint (Liquid US) 0.0004731 m^3 Planck Constant (h) 6.62607E-34 J s Planck Constant (h) 4.13567E-15 eV s Planck Constant (h/2p) 1.05457E-34 J s Planck Constant (h bar) 6.58212E-16 eV s Planck Constant (Molar) 3.99031E-10 J s/mol Planck Constant (Molar) 0.119626565 J m/mol Planck Length 1.616E-35 m Planck Mass 2.1767E-08 kg Planck Time 5.3906E-44 s Porter's Constant 1.467078079 Pounds per Acre 0.112 g/m^2 Pounds per Foot 1.488 kg/m Pounds per Inch 17.85 kg/m Pounds per Square Foot 4882 g/m^2 Pounds per Square Inch 703000 g/m^2 Pounds per Yard 0.496 kg/m Pressure (Atmospheric) 101325 N/m^2 Pressure (Atmospheric) 1.01325 bar Pressure (Atmospheric) 14.7 lbf in-2 Proton Charge to Mass Quotient 95788340.8 C/kg Proton Compton Wavelength h/mpc 1.32141E-15 m Proton g-Factor 5.585694675 Proton Gyromagnetic Ratio 267522212 s-1 T-1 Proton Gyromagnetic Ratio 42.5774825 MHz/T Proton Magnetic Moment 1.41061E-26 J/T Proton Magnetic Moment 0.001521032 Proton Magnetic Moment 2.792847337 Proton Magnetic Moment (Shielded H2O- sphere- 25°C) 1.41057E-26 J/T Proton Mass 1.67262E-27 kg Proton Mass 1.007276467 u Proton Mass 1.50328E-10 J Proton Molar Mass 0.001007276 kg/mol Proton-Electron Mass Ratio 1836.152668 Proton-Muon Mass Ratio 8.88024408 Proton-Neutron Magnetic Moment Ratio -1.45989805 Proton-Neutron Mass Ratio 0.998623479 Proton-Tau Mass Ratio 0.527994 Pythagoras' Constant 1.414213562 -Q- Quantized Hall Conductance 3.87405E-05 S Quantized Hall Resistance 25812.8056 Quantum of Circulation 0.000363695 m^2/s h/me 0.00072739 m^2/s Quantum Conductance 7.74809E-05 S Quantum Inverse Conductance 12906.40379 Ohm Quantum Magnetic Flux 2.06783E-15 Wb -R- Radiation Constant (Second) 0.014387752 m K Ramanujan-Soldner Constant 1.451369235 Refractive Index of Glass 1.5 Refractive Index of Paraffin 1.42 Refractive Index of Water 1.33 Residual Entropy For Square Ice 1.539600718 Resistance Quantized Hall RH 25812.8056 Ohm Rydberg Constant 10973731.57 m-1 Rydberg Constant 3.28984E+15 Hz Rydberg Constant 2.17987E-18 J Rydberg Number (Hydrogen) 10967758 m-1 -S- Sackur-Tetrode Constant -1.1517048 Sackur-Tetrode Constant -1.1648678 Second Radiation Constant 0.014387752 m K Self-Numbers Density Constant 0.252660259 Shapiro's Cyclic Sum Constant 0.4945668 Short Hundredweight (US) 4.535e4 g Short Ton 907100 g Short Ton 2000 lb Siegbahn Unit 1.00021E-13 m Sierpinski's Constant 2.58498176 Sigma 1E+12 m Siriometre 1.49598E+15 m Siriusweit 1.54284E+17 m Slug 14.59390294 kg Solar Constant 1400 W m-2 Specific Heat Capacity of Copper 385 J kg-1 K-1 Specific Heat Capacity of Water 4200 J kg-1 K-1 Specific Latent Heat of Fusion of Water 334000 J kg-1 Specific Latent Heat of Vapourisation of Water 2260000 J kg-1 Spectral Radiance (First Radiation Constant) 1.19104E-16 W m^2 sr-1 Speed of Light in a Vacuum 299792458 m/s Speed of Sound in Air at STP 340 m/s Square Mile 2589000 m^2 Square Yard 0.8361 m^2 Steel (Linear Expansivity) 0.000012 K-1 Steel (Young Modulus) 2.1E+11 Pa Stefan-Boltzmann Constant 5.6704E-08 W m-2 K-4 Sun's Energy Production 3.9E+26 W Sun's Mass 1.99E+30 kg Sun's Mean Distance From Earth 1.495E+11 m Sun's Mean Radius 696000000 m -T- Tau Compton Wavelength 6.977E-16 m Tau Mass 3.16788E-27 kg Tau Mass 1.90774 u Tau Molar Mass 0.00190774 kg mol-1 Tau-Electron Mass Ratio 3477.48 Tau-Muon Mass Ratio 16.8188 Tau-Neutron Mass Ratio 1.89135 Tau-Proton Mass Ratio 1.89396 Thermal Conductivity of Copper 385 W m-1 K-1 Thermal Conductivity of Glass 1 W m-1 K-1 Thomson Cross Section 6.65246E-29 m^2 Ton 106 kg Ton Short 907100 g Ton UK per 1000yd 1.111 kg/m Ton UK per Mile 0.6313 kg/m Troy Ounce 31.103 g -V- Vallée's Constant 0.199458818 Van der Corput's Constant 3.364317578 Verdet's Constant (Light at 589nm in water) 0.000477 rad/A Viscosity of Air at 20°C 0.000018 N s/m^2 Viscosity of Water at 20°C 0.001002 N s/m^2 von Klitzing Constant 25812.80757 Ohm -W- Water (Refractive Index) 1.33 Water (Specific Heat Capacity) 4200 J/kg/K Water (Specific Latent Hear of Vapourisation) 2260000 J/kg Water (Specific Latent Heat of Fusion) 334000 J/kg Water (Viscosity 20°C) 0.001002 N s/m^2 Wavelength of Electron Compton 2.42631E-12 m Weak Mixing Angle 0.2224 Weston Cell emf 1.0186 V Wien Displacement Law Constant 0.002897769 m K Wilbraham-Gibbs Constant 1.851937052 -Y- Young Modulus for Copper 1.3E+11 Pa Young Modulus for Steel 2.1E+11 Pa -Z- Zero Absolute -273.15 °C

Values obtained from MilMega table

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