Merici
Tables of Constants


Physical Constants

Constant Symbol Value
Speed of light c 299,792,458 m/s
Gravitational constant G 6.6742 x10-11m³/kg.s²
Planck constant h 6.626 069 x10-34 J.s
Electron charge magnitude e 1.602 176 x 10-19 C
Electron mass me 9.109 383 x 10-31kg
510.999 KeV/c²
Proton mass mp 1.672 622 x 10-27kg
938.272 MeV/c²
Neutron mass mn 1.674 927 x 10-27kg
939.565 MeV/c²
Atomic mass unit u 1.660 539 x 10-27kg
931.494 MeV/c²
Avogadro constant NA 6.022 141 x 1023
Electric constant eo 8,854 188 x 10-12 F/m
Magnetic constant mo 4p x 10-7 H/m
12,566 371 x 10-7 H/m

 

Astronomical Constants

Constant Value
Earth radius 6.378 137 x106 m
Earth mass 5.972 6 x1024 kg
Astronomical unit (Earth-Sun distance) 149,597,870,700 m
Sun radius 6.9551 x108 m
Sun mass 1.988 x1030 kg
Sun luminosity 3.828 x1026 W
Light year 9.460 53 x 1015 m
Parsec 3.262 ly
3.085 68 x 1016 m
Hubble expansion rate 67.3 ± 1.2 km/s.Mpc

 

Prefixes

FACTOR PREFIX SYMBOL FACTOR PREFIX SYMBOL
10-18 atto a 10 deca da
10-15 femto f 102 hecto h
10-12 pico p 103 kilo k
10-9 nano n 106 mega M
10-6 micro µ 109 giga G
10-3 milli m 1012 tera T
10-2 centi c 1015 peta P
10-1 deci d 1018 exa E