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Seitenansicht 73
Chapter 7
Constants Library
The constants libraiy contains a collection of conunonly used physical
constants and quantities. You can use them in equations and programs.
The following table lists the constants in the order they appear in the
library.
Abbrev
iation
Description
Value (SI)
NA
Avogadros number
6.0221367E23 gmopl
k
Boltzmann constant
1.380658E-23 J/K
Vm
Molar volume
22.4141 Pgmol
R
Universal gas constant
8.31451 J/(gmol-K)
StdT
Standard temperature
273.15 K
StdP
Standard pressure
101.325 kPa
a
Stefan-Boltzmann constant
5.67051E-8 W/Cm^.K-l)
c
Speed of light in vacuum
299792458 m/s
eO
Permittivity of vacuum
8.85418781761E-12 F/m
|i0
Permeability of vacuum
1.25663706144E-6 H/m
g
Acceleration of gravity
9.80665 m/s^
G
Gravitational constant
6.67259E-11 m^/Cs^-kg)
h
Plancks constant
6.6260755E-34 J-s
hbar
Dirac’s constant
1.05457266E-34 J-s
q
Electron charge
1.60217733E-19 C
me
Electron rest mas
9.1093897E-31 kg
qme
q/me
175881962000 C/lcg
Constants library
Page 7-1
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