HP 49g Graphing Calculator - Manual (Page 74)

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 Avogadro’s 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 Planck’s 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