Constants

Physical Value

Symbol

SI

CGS

eV

Exact Decimal (MKS)

Gravitational Constant

G

6.67x10-11 N m2 kg-2

6.67x10-8 dyne cm2 g-2

 

6.67259

Speed of Light

c

3.00x108 m s-1

3.00x1010 cm s-1

 

2.99792458

Planckís Constant

h

6.63x10-34 J s

6.63x10-27 erg s

4.14x10-15 eV s

6.6260755

h-bar

h

1.06x10-34 J s

1.06x10-27 erg s

6.59x10-15 eV s

h/2p

Boltzmannís Constant

k

1.38x10-23 J K-1

1.38x10-16 erg K-1

8.62x10-5 eV K-1

1.3806513

Stephan-Boltzman

s

5.67x10-8 J m-2 s-1 K-4

5.67x10-5 erg cm-2 s-1 K-4

3544 eV m-2 s-1 K-4

5.670399

Radiation Constant

a

7.57x10-16 J m-3 K-4

7.57x10-15 erg cm-3 K-4

4731 eV m-3 K-4

 

Proton Mass

mp

1.67x10-27 kg

1.67x10-24 g

 

1.6726231

Neutron Mass

mn

1.67x10-27 kg

1.67x10-24 g

 

1.6749286

Electron Mass

me

9.11x10-31 kg

9.11x10-28 g

 

9.1093897

Hydrogen Mass

mH

1.67x10-27 kg

1.67x10-24 g

 

1.007825035 u

Atomic Mass Unit

u

8.99x1016 J kg-1

1.66x10-24 g

931 MeV c-2

 

Coulombs Constant

kC

8.99x109 N m2 C-2

1

 

 

Electric Charge

e

1.60x10-19 C

4.80x10-10 esu

 

1.60217733

Electron Volt

eV

1.60x10-19 J

1.60x10-12 erg

1eV

 

Avagadroís Number

NA

6.02x1023 mole-1

6.02x1023 mole-1

 

6.0221367

Gas Constant

R

8.31 J mole-1 K-1

8.31x107 ergs mole-1 K-1

 

8.314510

Bohr radius

ao

5.29x10-11 m

5.29x10-9 cm

 

5.29177249

Ryberg Constant

RH

1.10x107 m-1

1.10x105 cm-1

 

1.0973731571

Permittivity Constant

eo

8.85x10-12 F m-1

 

 

8.85418781762

Permeability Constant

mo

1.26x10-6 H m-1

 

 

1.25663706143

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last update: 10/24/2011   ©2011 Peter L. Capak. All Rights Reserved. image