Introductory Physics Volume Two

D Unit Prefixes 193
§ D.3 Fundamental Constants
speed of light c 2.99792458 × 10 8 m s
(exact)
Planck constant h 6.6260755(40) × 10 −34 J · s
hc 1239.8424(93) eV · nm
1240 eV · nm
¯h 1.05457266(63) × 10 −34 J · s
¯hc 197.327053(59) eV · nm
fundamental charge e 1.60217733(49) × 10 −19 C
mass of electron m e 9.1093897(54) × 10 −31 kg
0.51099906(15) MeV/c 2
mass of proton m p 1.672631(10) × 10 −27 kg
938.27231(28) MeV/c 2
Boltzman constant k 1.380658(12) × 10 −23 J/K
8.617385(73) × 10 −5 eV/K
Avogadro number N A 6.0221367(36) × 10 23
permeability of free space µ 0 4π × 10 −7 N/A 2 (exact)
permittivity of free space ɛ 0 1/(µ 0 c 2 ) (exact)
8.854187817 × 10 −12 C 2 /N · m 2
1
4πɛ 0
8.99 × 10 9 N · m 2 /C 2
gravitational constant G 6.67259(85) × 10 −11 m 2 /kg · s
§ D.4 Unit Conversions
1 m 3.28 ft
1.6 km 1 mile
1 mile 5280 ft
1 hp 746 W
1 liter 1 × 10 −3 m 3
1 gallon 3.79 liters
1 atm 1.013 × 10 5 Pa
1 J 0.239 cal
1 kcal 4186 J
§ D.5 Unit Prefixes
f femto 10 −15
p pico 10 −12
n nano 10 −9
µ micro 10 −6
m milli 10 −3
k kilo 10 3
M mega 10 6
G giga 10 9
T tera 10 12