A-1
APPENDIX A
SELECTED CONSTANTS
I. Fundamental Constants
Cgs
2.99792458  10 cm • s
Gravitational constant ( G )
Permeability constant (  0 )
6.67
1.26
 10-8 dyn • cm2 • g-2 10-11 N • m2 • kg-2
 ––
10-6 Henry • m-1
Permittivity constant (  0 )
8.85
 ––
10-12 Farad • m-1
Electron charge ( e )
1.60219
4.80325
6.6262
4.1357
1.05459





10-19 Coulomb
6.5822
 10-16 eV • s
Avogadro’s number ( N A )
6.022
 1023 mol-1
1023 mol-1
Boltzmann’s constant ( k B )
1.3807
 10-16 erg • K-1
10-23 J • K-1
Gas constant ( R )
Bohr radius ( a0 )
8.617
8.314
0.529177
 10-5 eV • K-1
 107 erg • K-1 mol-1 1 J • K-1 • mol-1
 10-8 cm
10-10 m
1.09737
13.6058
 105 cm-1
 eV/ hc
Planck’s constant ( h )
Planck’s constant (   h 2 )
Rydberg ( R )
10
II. Other Physical Constants
-1
––
10-10 esu
10-27 erg • s
10-15 eV • s
10-27 erg • s
108 m • s-1
10-34 J • s
10-34 J • s
107 m-1
Cgs
Mks
Acceleration of gravity ( g )
9.80665
 10 cm • s
local
at equatorial sea level
at polar sea level
Earth’s radius ( rearth )
9.809
9.78
9.83
6.38




Earth’s mass ( mearth )
5.98
 1027 g
1024 kg
Electron rest mass ( me )
9.1095
 10-28 g
10-31 kg
Proton rest mass ( m p )
1.6726
 10-24 g
10-27 kg
Neutron rest mass ( mn )
1.6748
 10-24 g
10-27 kg
 104 cm • s-1
102 m • s-1
Speed of sound in dry air at STP 3.31
*
Mks
Speed of light ( c )
*
-2
m • s-2
102 cm • s-2
102 cm • s-2
102 cm • s-2
108 cm
m • s-2
m • s-2
m • s-2
106 m
2
This number is exact as the meter is now defined in terms of c and the second.
A-2
II. Other Physical Constants
Cgs
(continued)
Heat capacity of water
Heat of fusion of water (at 100°C)
Heat of vaporization of water (at 0°C)
Index of refraction ( n ) of
water (589.2 nm)
crown glass (589.2 nm)
air (590.0 nm)
Mks
4.19  107 erg • g-1 • K-1 103 J • kg-1 • K-1
3.34  109 erg • g-1
105 J • kg-1
2.27  1010 erg • g-1
106 J • kg-1
1.33
1.52
1.0002765
III. Conversion Factors
1 Electron volt (eV)
1 angstrom (Å)
1 Pascal (Pa)
1 Torr
1 atmosphere (atm)
1 erg
1 calorie
1 Tesla
1.60219  10-19 J
0.1 nm
1 N • m-2
1 mm Hg = 133 Pa
760 Torr = 101.3 kPa
10-7 J
4.18 J
1 Weber • m-2 = 104 Gauss
IV. Standard Resistor Color Code
first three bands
black
0
brown 1
red
2
orange 3
yellow 4
green
blue
violet
gray
white
fourth band
unmarked
silver
gold
5
6
7
8
9
tolerance
20%
10%
5%
V. Temperatures of Substances (at a pressure of one atmosphere)
Boiling point of water
Melting point of ice
Dry ice + methanol
Boiling point liquid nitrogen
Boiling point liquid helium
100C
0C
-78.5C
-195.8C
-269.0C
VI. Color as Function Of Wavelength
400 - 450 nm
450 - 500 nm
500 - 575 nm
575 - 595 nm
595 - 620 nm
620 - 700 nm
Violet
Blue
Green
Yellow
Orange
Red
=
≡
=
=
=
373.15 K
273.15 K
194.7 K
77.4 K
4.2 K