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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 Naperian (Natural) Logarithm of 10 ln 10 2.302 585 092 994 045 684 02  
           
  Logarithm of 2 Naperian (Natural) Logarithm of 2 ln 2 0.693 147 180 559 945 309 42  
           
  Natural Logarithm of 10 Natural Logarithm of 10 ln 10 2.302 585 092 994 045 684 02  
           
  Natural logarithm of 2 Natural logarithm of 2 ln 2 0.693 147 180 559 945 309 42  
           
  Nautical Mile (International) Nautical Mile (International)

n mile

1.852 × 103 m

 
           
  Nautical Mile (UK) Nautical Mile (UK)  

1.853 184 × 103 m

 
           
    Nebuchadnezzar

 

 5 jeroboams
10 magnums
20 standard wine bottles 		 
           
  Neutron Compton Wavelength Neutron Compton Wavelength h/mnc λC,n 1.319 590 898 ± 0.000 000 010 × 10 −15  m  
           
  Neutron g-Factor Neutron g-Factor gn

−3.826 085 45 ± 0.000 000 90

 
           
  Neutron Gyromagnetic Ratio Neutron gyromagnetic ratio γn 1.832 471 88 ± 0.000 000 44 × 10 8  s −1 T −1  
           
  Neutron Magnetic Moment Neutron Magnetic Moment μn − 9.662 3640 ± 0.000 0023 × 10 −26 J T −1  
           
  Neutron Mass Neutron Mass mn

1.674 927 16 ± 0.000 000 13 × 10−27 kg
1.008 664 915 78 ± 0.000 000 000 55 u
1.505 349 46 ± 0.000 000 12 × 10−10 J/ c 2
939.565 530 ± 0.000 038 MeV/ c 2

 
           
  Neutron Mass N Neutron Molar Mass NAmn M(n) 1.008 664 915 78 ± 0.000 000 000 55 × 10 −3
 kg mol −1		  
      Mn    
           
  Neutron to Shielded Proton Magnetic Moment Ratio Neutron to Shielded Proton Magnetic Moment Ratio μn/μ'p −0.684 996 94 ± 0.000 000 16  
           
  Neutron-Electron Magnetic Moment Ratio Neutron-Electron Magnetic Moment Ratio μn/μe 1.040 668 82 (25) × 10 −3  
           
  Neutron-Electron Mass Ratio Neutron-Electron Mass Ratio mn/me

1838.683 6550 ± 0.000 0040

 
           
  Neutron-Muon Mass Ratio Neutron-Muon Mass Ratio mn/mμ

8.892 484 78 ± 0.000 000 27

 
           
  Neutron-Proton Magnetic Moment Ratio Neutron-Proton Magnetic Moment Ratio μn/μp −0.684 979 43 ± 0.000 000 16  
           
  Neutron-Proton Mass Ratio Neutron-Proton Mass Ratio mn/mp 1.001 378 418 87 ± 0.000 000 000 58  
           
  Neutron-Tau Mass Ratio Neutron-Tau Mass Ratio mn/mτ 0.528 722 ± 0.000 086  
           
  Newtonian Constant of Gravitation Newtonian Constant of Gravitation G 6.673 ± 0.010 × 10 −11  m 3 kg −1 s  
      G/ħc 6.707 ± 0.010 × 10 −39 (GeV/c 2 ) −2  
           
  Nife Cell, EMF of Nife Cell, EMF of   1.40 V  
           
  Niven's Constant Niven's Constant C 1.7052111401  
           
  Nuclear Magneton

 Nuclear Magneton

 μN

 5.050 783 17 ± 0.000 000 20 × 10−27 J T −1
3.152 451 238 ± 0.000 000 024 × 10−8 eV T−1		  
      μN/h    
           
  Number, Gold Number, Gold φ 1.618 033 988 749 894 848 20  
           
 
 
 
Nn | Oo | Pp | Qq
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  Oo  
    Name Symbol Value  
           
    Optic  

25 × 10−6 m3 (25 mL)

 
           
    Ounce

oz

437.5 gr
0.028 349 523 125 kg

 
           
  weight value Ounce, Apothecaries' oz (apoth) 3.110 347 680 × 10 −2  kg  
      oz (ap.)    
           
  weight value Ounce, Avoirdupois oz avdp 2.834 952 313 × 10 −2 kg  
      oz (av.) 0.0625 lb (av.)  
      oz 16 drachms (av.)  
           
  weight value 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 Paraffin, Refractive Index of np 1.42  
           
    Parsec  

3.085 677 × 1016 m
3.261 507 ly

 
           
    Peck  

16 pint
9.092 176 × 10−3 m3

 
           
    Peck (US)  

16 dry pint (US)
8.809 76 × 10−3 m3

 
           
    Pennyweight   0.05 troy ounce
24 grain
1.555 173 84 × 10−3 kg 		 
           
  Permeability of Free Space Permeability of Free Space μ0 4p × 10 -7  N A −2
  
        12.566 370 614 × 10 −7 N A −2  
           
  Permittivity of Free Space Permittivity of Free Space ε0 8.854 187 817 × 10−12 F m−1  
       
 
  Archemedes' Constant or Ludolph's Constant Pi
Archimedes’ constant
Ludolph’s constant		 π

3.14159 26535 89793 23846 26433 83279 50288 41971 69399 37511...

  
           
  Pint (UK) Pint (UK)  

20 fl oz
5.682 61 × 10−4 m3

 
           
  Pint Dry (US) Pint, Dry (US) pt (US, dry) 5.506 104 69 × 10−4 m 3  
           
  Pint, Imperial Pint, Imperial   5.682 × 10 −4 m 3
  
           
  Pint, Liquid (US) Pint, Liquid (US)   4.731 × 10 −4 m 3
  
           
  Planck Constant Planck Constant (h) h 6.626 068 76 ± 0.000 000 52 × 10 −34 J s  
        4.135 667 27 ± 0.000 000 16 × 10 −15 eV s  
           
  Planck Constant (h/2 pi) Planck Constant (h/2π) ħ 1.054 571 596 ± 0.000 000 082 × 10 −34 J s  
      (h bar) 6.582 118 89 ± 0.000 000 26 × 10 −16 eV s  
           
  Planck Constant, Molar Planck Constant, Molar NA h 3.990 312 689 ± 0.000 000 030× 10−10 J s mol−1  
      NA hc 0.119 626 564 92 ± 0.000 000 000 91 J m mol−1  
           
  Planck Length Planck Length ħ/m P c = (ħG/c3)1/2 lP 1.6160 ± 0.0012 × 10 −35 m  
           
  Planck Mass Planck Mass (ħG/c)1/2 mP 2.1767 ± 0.0016 × 10 −8 kg  
           
  Planck Time l Planck Time l P/c = (ħG/c5)1/2 tp 5.3906 ± 0.0040 × 10−44 s
 
           
  Porter's Constant Porter's Constant C 1.467 078 079...  
           
  Pound Pound lb

0.453 592 37 kg

 
           
  Pounds per acre

Pounds per Acre

lb acre−1

 0.112 g m−2  
           
  Pounds per Foot Pounds per Foot lb ft−1 1.488 kg m−1  
           
  Pounds per Inch Pounds per Inch lb in−1 17.85 kg m−1  
           
  Pounds per Square Foot Pounds per Square Foot lb ft−2 4.882 × 103 g m−2  
           
  Pounds per Square Inch Pounds per Square Inch lb in−2 7.03 × 105 g m−2  
           
  Poounds per Yard Pounds per Yard lb yd−1 0.496 kg m−1  
           
    Pressure, Atmospheric   1.013 25 × 10 5  N m−2  
        1.013 25 bar  
        14.7 lbf in−2  
           
  Proton Charge To Mass Quotient Proton Charge to Mass Quotient e/mp 9.578 834 08 ± 0.000 000 38 × 107 C kg−1  
           
  Proton Compton Wavelength Proton Compton Wavelength h/m pc λC,p 1.321 409 847 ± 0.000 000 010 × 10−15 m  
           
  Proton g-Factor Proton g-Factor 2µp /µN gp 5.585 694 675 ± 0.000 000 057  
           
  Proton Gyromagnetic Ratio Proton Gyromagnetic Ratio 2µp/ħ γp 2.675 222 12 ± 0.000 000 11 × 108 s−1 T−1  
      γp/2π 42.577 4825 ± 0.000 0018 MHz T−1  
           
  Proton Magnetic Moment Proton Magnetic Moment μp 1.410 606 633 ± 0.000 000 058 × 10−26 J T−1  
      μp/μB 1.521 032 203 ± 0.000 000 015 × 10−3  
      μp/μN 2.792 847 337 ± 0.000 000 029  
           
  Proton Magnetic Moment, Shielded Proton Magnetic Moment, Shielded
(H2O, sphere, 25°C)		 μ'p 1.410 570 399 ± 0.000 000 059 × 10−26 J T−1  
      μ'p/μB 1.520 993 132 ± 0.000 000 016 × 10−3  
      μ'p/μN 2.792 775 597 ± 0.000 000 031  
           
  Proton Magnetic Shielding Correction Proton Magnetic Shielding Correction
1- µ'p/µp (H2O, sphere, 25°C)		 σ'p 25.687 ± 0.015 × 10−6  
           
  proton value Proton Mass mp 1.672 621 58 ± 0.000 000 13 × 10 −27 kg  
        1.007 276 466 88 ± 0.000 000 000 13 u  
        1.503 277 31 ± 0.000 000 12 × 10−10 J  
           
  Proton Molar Mass N Proton Molar Mass NAmp M(p) 1.007 276 466 88 ± 0.000 000 000 13 × 10−3  kg mol−1  
      Mp    
           
  Proton-Electron Mass Ratio Proton-Electron Mass Ratio mp/me 1836.152 6670 ± 0.000 0039  
           
  Proton-Muon Mass Ratio Proton-Muon Mass Ratio mp/mμ 8.880 244 08 ± 0.000 000 27  
           
  Proton_neutron Magnetic Moment Ratio Proton-Neutron Magnetic Moment Ratio μp/μn −1.459 898 05 ± 0.000 000 34  
           
  Proton-Neutron Mass Ratio Proton-Neutron Mass Ratio mp/mn 0.998 623 478 55 ± 0.000 000 000 58  
   
  Proton-Tau Mass Ratio Proton-Tau Mass Ratio mp/mτ 0.527 994 ± 0.000 086  
   
  maths constant Pythagoras' Constant 1.414 213 562 4  
           
 
 
 
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  Qq  
    Name Symbol Value  
           
    Quantized Hall Conductance e2/h 3.874 046 14 × 10−5 S  
     
    Quantized Hall Resistance RH 25812.8056 Ω  
     
  Quantum of Circulation Quantum of Circulation h/2me 3.636 947 516 ± 0.000 000 027 × 10−4  m2  s−1  
    h/me 7.273 895 032 ± 0.000 000 053 × 10−4  m2  s−1  
     
  Quantum, Conductance 2e Quantum, Conductance 2e2/h G0 7.748 091 696 ± 0.000 000 028 × 10−5 S  
     
  Quantum, Inverse Conductance Quantum, Inverse Conductance G0−1 12906.403 786 ± 0.000 047 Ω  
     
  QUantum, Magnetic Flux Quantum, Magnetic Flux Φ0 2.067 833 636 ± 0.000 000 081 × 10−1 Wb  
     
    Quart  

2 pint
1.136 522 × 10−3 m3

 
           
   

Quarter

  28 lb
12.700 586 36 kg 		 
           
    Quire  

24 sheets (of paper)
0.05 ream

 
           
           
 
 
 
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