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Constants Library

The physical constants are in the Phys menu, Constant sub-menu. The following table gives the Constants Library :
Name Description
_NA_ Avogadro's number
_k_ Boltzmann constant
_Vm_ Molar volume
_R_ Universal gas constant
_StdT_ Standard temperature
_StdP_ Standard pressure
_sigma_ Stefan-Boltzmann constant
_c_ Speed of light in vacuum
_epsilon0_ Permittivity of vacuum
_mu0_ Permeability of vacuum
_g_ Acceleration of gravity
_G_ Gravitational constant
_h_ Planck's constant
_hbar_ Dirac's constant
_q_ Electron charge
_me_ Electron rest mass
_qme_ q/me (Electron charge/masse)
_mp_ Proton rest mass
_mpme_ mp/me (proton masse/electron masse)
_alpha_ Fine structure constant
_phi_ Magnetic flux quantum
_F_ Faraday constant
_Rinfinity_ Rydberg constant
_a0_ Bohr radius
_muB_ Bohr magneton
_muN_ Nuclear magneton
_lambda0_ Photon wavelength (ch/e)
_f0_ Photon frequency (e/h)
_lambdac_ Compton wavelength
_rad_ 1 radian
_twopi_ 2*pi radians
_angl_ 180 degrees angle
_c3_ Wien displacement constant
_kq_ k/q (Boltzmann/electron charge)
_epsilon0q_ epsilon0/q (permitivity /electron charge)
_qepsilon0_ q*epsilon0 (electron charge *permitivity)
_epsilonsi_ Silicium dielectric constant
_epsilonox_ Bioxyd of silicium dielectric constant
_I0_ Reference intensity
To have the value of a constant, input the constant name in the command line of Xcas and valid with enter (don't forget to put _ at the begining and at the end of the constant name).


next up previous contents index
suivant: À propos de ce monter: Constants précédent: Notation of physical constants   Table des matières   Index
giac documentation written by Renée De Graeve and Bernard Parisse