Sponsored by the Institute of Physics   Constants   A to B   C to D   E to F   G to I   J to L   M   N to Q   R to T   U to Z Equations Periodic Table Conversions Java Structurer SI Units Symbols   Printer Version Science Constants - N to Q Nn | Oo | Pp | Qq A to B | C to D | E to F | G to I | J to L | M | N to Q | R to T | U to Z Nn   Name Symbol Value   Naperian (natural) logarithm of 10 ln 10 2.30258509299404568402    Naperian (natural) logarithm of 2 ln 2 0.69314718055994530942    Natural logarithm of 10 ln 10 2.30258509299404568402    Natural logarithm of 2 ln 2 0.69314718055994530942    Nautical Mile, International 1852 m   Nautical Mile, UK 1853.18 m   Neutron Compton Wavelength h/mnc λC,n 1.319590898(10) × 10-15 m Neutron g-Factor 2µn/µN gn -3.82608545(90)    Neutron Gyromagnetic Ratio 2|µn|/ħ γn γn/2π 1.83247188(44) × 108 s-1 T-1 29.1646958(70) MHz T-1   Neutron Magnetic Moment µn µn/µB µn/µN -0.96623640(23) × 10-26 J T-1 -1.04187563(25) × 10-3  -1.91304272(45)    Neutron Mass mn 1.67492716(13) × 10-27 kg 1.00866491578(55) u 1.50534946(12) × 10-10 J   Neutron Molar Mass NAmn M(n) Mn 1.00866491578(55) × 10-3 kg mol-1   Neutron to Shielded Proton Magnetic Moment Ratio (H2O, sphere, 25°C) µn/µ'p -0.68499694(16)    Neutron-Electron Magnetic Moment Ratio µn/µe 1.04066882(25) × 10-3    Neutron-Electron Mass Ratio mn/me 1.8386836550(40)    Neutron-Muon Mass Ratio mn/mµ 8.89248478(27)    Neutron-Proton Magnetic Moment Ratio µn/µp -0.68497934(16)    Neutron-Proton Mass Ratio mn/mp 1.00137841887(58)    Neutron-Tau Mass Ratio mn/mτ 0.528722(86)    Newtonian Constant of Gravitation G G/ħc 6.673(10) × 10-11 m3 kg-1 s-1 6.707(10) × 10-39 (GeV/c2)-2   Nife Cell, emf of 1.40 V   Niven's Constant C 1.7052111401    Nuclear Magneton µN µN/h 5.05078317(20) × 10-27 J T-1 3.1524541238(24) × 10-8 eV T-1 7.62259396(31) MHz T-1   Number, Gold φ 1.61803398874989484820    Nn | Oo | Pp | Qq To the top | To the bottom A to B | C to D | E to F | G to I | J to L | M | N to Q | R to T | U to Z Oo   Name Symbol Value   Ounce, Apothecaries' oz (apoth) oz (ap.) 3.110347680 × 10-2 kg Ounce, Avoirdupois oz avdp oz (av.) oz 2.834952313 × 10-2 kg 0.0625 lb (av.) 16 drachms (av.) Ounce, Troy oz 31.103 g   Nn | Oo | Pp | Qq To the top | To the bottom A to B | C to D | E to F | G to I | J to L | M | N to Q | R to T | U to Z Pp   Name Symbol Value   Paraffin, Refractive Index of np 1.42    Permeability of Free Space µ0 4π × 10-7 N A-2 12.566370614 × 10-7 N A-2   Permittivity of Free Space ε0 8.854187817 × 10-12 F m-1   Pi π 3.1415926535897932384626433832795  Pint, Dry (US) pt (US, dry) 5.50610469 × 10-4 m3 Pint, Imperial 5.682 × 10-4 m3   Pint, Liquid (US) 4.731 × 10-4 m3   Planck Constant (h) h 6.62606876(52) × 10-34 J s 4.13566727(16) × 10-15 eV s   Planck Constant (h/2π) ħ (h bar) 1.054571596(82) × 10-34 J s 6.58211889(26) × 10-16 eV s   Planck Constant, Molar NA h NA hc 3.990312689(30) × 10-10 J s mol-1 0.11962656492(91) J m mol-1   Planck Length ħ/mPc = (ħG/c3)1/2 lP 1.6160(12) × 10-35 m   Planck Mass (ħc/G)1/2 mP 2.1767(16) × 10-8 kg   Planck Time lP/c = (ħG/c5)1/2 tP 5.3906(40) × 10-44 s   Porter's Constant C 1.4670780794  Pounds per Acre lb acre-1 0.112 g m-2   Pounds per Foot lb ft-1 1.488 kg m-1   Pounds per Inch lb in-1 17.85 kg m-1   Pounds per Square Foot lb ft-2 4.882 × 103 g m-2   Pounds per Square Inch lb in-2 7.03 × 105 g m-2   Pounds per Yard lb yd-1 0.496 kg m-1   Pressure, Atmospheric 1.01325 × 105 N m-2 1.01325 bar 14.7 lbf in-2 Proton Charge to Mass Quotient e/mp 9.57883408(38) × 107 C kg-1   Proton Compton Wavelength h/mpc λC,p 1.321409847(10) × 10-15 m Proton g-Factor 2µp/µN gp 5.585694675(57)    Proton Gyromagnetic Ratio 2µp/ħ γp γp/2π 2.67522212(11) × 108 s-1 T-1 42.5774825(18) MHz T-1   Proton Magnetic Moment µp µp/µB µp/µN 1.410606633(58) × 10-26 J T-1 1.521032203(15) × 10-3  2.792847337(29)    Proton Magnetic Moment, Shielded (H2O, sphere, 25°C) µ'p µ'p/µB µ'p/µN 1.410570399(59) × 10-26 J T-1 1.520993132(16) × 10-3  2.792775597(31)    Proton Magnetic Shielding Correction 1- µ'p/µp (H2O, sphere, 25°C) σ'p 25.687(15) × 10-6    Proton Mass mp 1.67262158(13) × 10-27 kg 1.00727646688(13) u 1.50327731(12) × 10-10 J   Proton Molar Mass NAmp M(p) Mp 1.00727646688(13) × 10-3 kg mol-1   Proton-Electron Mass Ratio mp/me 1836.1526675(39)    Proton-Muon Mass Ratio mp/mµ 8.88024408(27)    Proton-Neutron Magnetic Moment Ratio µp/µn -1.45989805(34)    Proton-Neutron Mass Ratio mp/mn 0.99862347855(58)    Proton-Tau Mass Ratio mp/mτ 0.527994(86)    Pythagoras' Constant 1.4142135624  Nn | Oo | Pp | Qq To the top | To the bottom A to B | C to D | E to F | G to I | J to L | M | N to Q | R to T | U to Z Qq   Name Symbol Value   Quantized Hall Conductance e2/h 3.87404614 × 10-5 S   Quantized Hall Resistance RH 25812.8056 Ω   Quantum of Circulation h/2me h/me 3.636947516(27) × 10-4 m2 s-1 7.273895032(53) × 10-4 m2 s-1   Quantum, Conductance 2e2/h G0 7.748091696(28) × 10-5 S   Quantum, Inverse Conductance G0-1 12906.403786(47) Ω   Quantum, Magnetic Flux Φ0 2.067833636(81) × 10-15 Wb   Nn | Oo | Pp | Qq To the top | To the bottom A to B | C to D | E to F | G to I | J to L | M | N to Q | R to T | U to Z   [ H O M E ] [ S C I E N C E ] [ M A T H S ] [ A S T R O N O M Y ] Download | Shop | Contact | About   Page compiled: Wed Sep 05 18:37:52 GMT+01:00 2001