Tcaep logo
science maths astronomy Contact about
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
Conversions
SI Units
Symbols
Print version

Science

Constants - C to D


Cc |  Dd
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

  Cc  
  Name Symbol Value  
           
  maths Constant Cahen's constant  

0.629 465 020...

  
           
    Calorie cal

4.1868 J

  
           
   

Carat
Metric carat

 

2 × 10−4 kg

 
           
    Carbon-14 half life  

5730(40) years

 
           
  Catalan's Constant Catalan's Constant G 0.915 965 594 
 
           
  Chain Chain
Gunter’s chain
Imperial chain
Surveyor’s chain 		ch

22 yd
20.1168 m

 
           
  Characteristic Impedence of Vacuum Characteristic Impedence of Vacuum Z0 376.730 313 461 Ω
 
           
  Charge to Mass Quotient, Electron Charge to Mass Quotient, Electron −e/m e −1.758 820 174 ± 0.000 000 071 × 1011 C kg −1
  
           
  Charge to Mass Quotient, Proton Charge to Mass Quotient, Proton e/mp 9.578 834 08 ± 0.000 000 38 × 107 C kg −1
  
           
  Charge, Electron Charge, Electron e 1.602 176 462 ± 0.000 000 063 × 10 −19 C
 
      e/h 2.417 989 491 ± 0.000 000 095 × 10 14 A J−1
  
           
  Charge, Electron Specific Charge, Electron Specific −e/m e −1.758 819 ± 0.000 062 × 10 11 C kg −1  
           
    Circular inch   π/4 in2
5.067 074 × 10 −4 m2		  
           
   

Circular mil

 

π/4 10−6 in2
10−6 Circular inch
5.067 074 × 10−10 m2

  
           
  Circulation, Quantum of Circulation, Quantum of h/2m e 3.636 947 516 ± 0.000 000 027 × 10 −4 m 2 s −1  
      h/m e 7.273 895 032 ± 0.000 000 053 × 10 −4 m 2 s −1  
           
  Classical Electron Radius Classical Electron Radius re 2.817 940 285 ± 0.000 000 031 × 10 −15 m  
           
  Common logarithm of 2, Briggsian logarithm of 2

Common logarithm of 2
Briggsian logarithm of 2

log 10 2

0.301 029 995 663 981 195 213 738 894 724 493 026 788 189 881 462

  
           
  Compton wavelength of electron Compton Wavelength of Electron λ c
2.426 310 215 ± 0.000 000 018 × 10 −12 m  
           
           
  Compton Wavelength, Muon Compton Wavelength, Muon λ c 1.173 444 197 ± 0.000 000 033 × 10 −14 m  
           
  Compton wavelength, Neutron Compton Wavelength, Neutron λ c 1.319 590 898 ± 0.000 000 010 × 10 −15 m  
           
  Compton Wavelength, Proton Compton Wavelength, Proton λ c

1.321 409 847 ± 0.000 000 010 × 10 −15 m

 
           
  Compton Wavelength, Tau Compton Wavelength, Tau λ c 6.9770 ± 0.0011 × 10 −16 m  
           
  Conductance Quantum 2e to the power of 2 divided by eh Conductance Quantum 2e2/h G0 7.748 091 696 ± 0.000 000 028 × 10 −5 S  
           
    Conductance, Quantized Hall e2/h 3.874 046 14 × 10 −5 S
 
           
  Constant, Absolute Entropy Constant, Absolute Entropy      
           
  Constant Apery's Constant, Apéry's ζ(3) 1.202 056 903  
           
  Constant, Boltzmann Constant, Boltzmann k 1.380 6503 ± 0.000 0024 × 10 −23 J K−11  
        8.617 342 ± 0.000 015 × 10 −5 eV K −11  
           
  Constant, Catalan's Constant, Catalan's G 0.915 965 594  
           
  Constant, Dirac's Constant, Dirac's 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  
           
           
  Constant, Electric Constant, Electric (1/μ0c2) ε0 8.854 187 817 × 10 −12 F m −1
  
           
  Constant, Euler's Constant, Euler's γ, C
 0.577 215 664 901 532 860 61  
           
  Constant, Faraday Constant, Faraday F 96485.3415 ± 0.0039 C mol −1  
           
  Constant, Feigenbaum's Constant, Feigenbaum's δ 4.669 210 609 102 990  
           
  Constant, Fermi coupling Constant, Fermi coupling   1.4 × 10 −50 J m −3
  
           
    Constant, Fermi GF/(hc)3 1.166 39 ± 0.000 01 × 10 −5 GeV −2  
           
  Constant, Fine Structure Constant, Fine Structure α 7.297 352 533 ± 0.000 000 027 × 10 −3  
           
  Constant, First Radiation 2phc Constant, First Radiation 2phc2 c1 3.741 771 07 ± 0.000 000 29 × 10−16 W m2  
           
    Constant, Gas R 8.314 J K−1 mol−1  
           
  Constant, Gravitational Constant, Gravitational G 6.673 ± 0.010 × 10−11 N m2 kg−2  
           
  Constant, Inverse Fine Structure Constant, Inverse Fine Structure α 137.035 999 76 ± 0.000 000 50 × 10−3  
           
  Constant, Khintchine's Constant, Khintchine's K 2.685 452 001   
           
  Constant, Loschmidt Constant, Loschmidt n0 2.686 7775 ± 0.000 0047 × 1025 m−3  
           
  Constant, Loschmidt (T=273.15K, p=100kPa) Constant, Loschmidt (T=273.15K, p=100kPa) Vm 22.710 981 ± 0.000 040 × 10−3 m3 mol−1  
           
  Constant, Magnetic Constant, Magnetic μ0 4p × 10−7 N A−2  
        12.566 370 614 × 10−7 N A−2  
           
  Constant, Planck (h) Constant, Planck (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  
           
  Costant, Pythgoras' Constant, Pythagoras'   1.414 213 5624  
           
  physical constant Constant, Sackur-Tetrode S0/R −1.164 8678(44) at 1K and 101 325 Pa  
           
  Constant, Solar Constant, Solar   1400 W m−2  
           
  Constant, Stefan-Boltzmann (pi to the power of 2/60)k to the power of 4 divided by h to the power of 3 c2 Constant, Stefan-Boltzmann (π2 /60)k4/ħ3 c2 σ 5.670 400 ± 0.000 040 × 10−8 W m−2 K−4  
           
    Constant, Verdet's (Light at 589nm in water)   0.000 477 rad A−2  
           
  Constant, von Kliltzing Constant, von Klitzing RK 25812.807 572 ± 0.000 095 Ω  
           
  Constant, Wien Displacement Law Constant, Wien Displacement Law b 2.897 7686 ± 0.000 0051 × 10−3 m K
 
           
  Constant, Planck (h/2p) Constants, Planck (h/2p) 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  
           
  Constants, Rydberg alpha to the power of 2 m (of e) Constants, Rydberg α2mec/2h R∞ 10973731.568 549 ± 0.000 083 m−1  
      R∞c 3.289 841 960 368 ± 0.000 000 000 025 × 1015 Hz  
      R∞hc 2.179 871 90 ± 0.000 000 17 × 10−18 J  
           
    Copper, Linear Expansivity of α 1.7 × 10−5  K−1  
           
    Copper, Specific Heat Capacity of cc 385 J kg−1 K−1  
           
    Copper, Thermal Conductivity of kc 385 W m−1 K−1  
           
    Copper, Young Modulus for Ec 1.3 × 1011 Pa  
           
  128 ft cubed Cord  

128 ft3
3.624 556 363 776 m3

  
         
  16 ft cubed Cord foot 16 ft3
0.453 069 545 472 m3 		 
         
    Critical Temperature of Air cd (UK) -190 °C
183 K		  
           
  Cross Section, Thomson Cross Section, Thomson se 0.665 245 854 ± 0.000 000 015 × 10−28  m2  
           
  Cube Foot Cube Foot ft3 2.831 684 6592 × 10−2  m3  
      cu. ft. 1728 in3  
           
  Cube Inch Cube Inch in3 1.638 7064 × 10-5  m3  
      cu. in.    
           
  Cube Yard Cube Yard yd3 7.645 548 58 × 10−5  m3  
      cu. yd. 27 ft3  
      466 56 in3  
         
    Cup   about 250 × 10−6 m3 (250 mL)  
           
    Curie Ci 3.7 × 1010  Bq  
           
    Cusec  

1 ft3 s−1
0.028 316 846 592 m3 s−1

  
           
 
 
 
Cc |  Dd
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

 
   
   
   
   
  Dd  
    Name Symbol Value  
           
  Dalton Dalton amu 1.660 538 73 ± 0.000 000 13 × 10−27  kg  
      mu 931.494 013 ± 0.000 037 MeV  
           
  Daniel Cell, emf of Daniel Cell, emf of   1.08 V  
           
    Day d

86400 s
1440 min
24 h

 
           
    Density of Air  

1.225 kg m−3

  
           
  Density, Earth's Average Density, Earth's Average   5.517 × 103  kg m-3  
           
    Dessert spoon  

0.5 tablespoon
2 teaspoon
about 7.25 × 10−6 m3 (7.25 mL)

 
           
  Deuteron magnetic Moment Deuteron Magnetic Moment   0.433 073 457 ± 0.000 000 018 × 10-26  J T−1  
           
  Deuteron Molar Mass Deuteron Molar Mass Md 2.013 553 214 ± 0.000 000 024 u  
           
  Deuteron Mass Deuteron Mass md

3.343 583 09 ± 0.000 000 26 × 10−27  kg

 
        2.013 553 212 71 ± 0.000 000 000 35 u  
       

3.005 062 62 ± 0.000 00024 × 10−10 J/ c2

 
       

1875.612 762 ± 0.0000075 MeV/ c2

 
           
  Deuteron-electron Magnetic Moment Ratio Deuteron-Electron Magnetic Moment Ratio µd/µe −4.664 345 537 ± 0.000 000 050 × 10−4  
           
  Deuteron-Electron Mass Ratio Deuteron-Electron Mass Ratio md/me

3670.482 9550 ± 0.000 0078

 
           
  Deuteron-Neutron Magnetic Moment Ratio Deuteron- neutron Magnetic Moment Ratio µd/µn

−0.448 206 52 ± 0.000 000 11

 
           
  Deuteron-proton Magnetic Moment Deuteron-proton magnetic moment ratio µd/µp

0.307 012 2083 ± 0.000 000 0045

 
           
  Deuteron-proton Mass Ratio Deuteron- proton Mass Ratio md/mp

1.999 007 500 83 ± 0.000 000 000 41

 
           
    Dioptre  

1 m−1

 
           
  Dirac's Constant Dirac's Constant 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  
           
  Drachm or dram

Drachm
Dram

 

0.125 oz apoth
3.887 9346 × 10−3 kg
60 grain

 
           
  Drachm (Avoirdupois) Drachm (Avoirdupois) dr (avdp.) 1.771 845 195 × 10-3  kg  
      dr. (av.) 0.003 906 25 lb  
        0.0625 oz  
           
  0.0625 oz Dram  

0.0625 oz
1.771 845 195 3125 × 10−3 kg

 
           
  Dram (Avoirdupois) Dram (Avoirdupois) dr (avdp.) 1.771 845 195 × 10-3  kg  
      dr. (av.) 0.003 906 25 lb  
        0.0625 oz  
           
    Dry barrel

bbl

7056 in3
0.115 627 123 584 m3

 
           
  Dry pt Dry Pint dry pt 5.506 10 × 10-4 m3  
           
  Dry Quart (US) Dry quart (US)  

2 dry pint (US)
1.101 22 × 10−3 m3

 
           
    Dyne

dyn

10−5 N

 
     
 
 
 
Cc |  Dd
To the top
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 || : || Contact  || : || About  ||

Developed By
 DOMEX E-DATA PVT. LTD.,