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"File PHYSICAL.MTH, copyright (c) 1990 by Soft Warehouse, Inc."

"Fundamental Physical Constants -- Reference: Physics Today, August 1989"

"Load METRIC.MTH when using this file."

"Speed of light in vacuum:"

c_:=299792458*(meter/second)

"Newtonian constant of gravitation:"

g_:=6.6726*10^(-14)*(meter^3/(gram*second^2))

"Planck constant:"

h_:=6.6260755*10^(-34)*joule*second

"Elementary charge:"

e_:=1.60217733*10^(-19)*coulomb

"Fine structure constant:"

alpha:=0.00729735308

"Rydberg constant:"

r_inf:=10973731.534/meter

"Bohr radius:"

a0:=5.29177249*10^(-11)*meter

"Mass of an electron, proton, and neutron:"

me:=9.1093898*10^(-28)*gram

mp:=1.6726231*10^(-24)*gram

mn:=1.6749286*10^(-24)*gram

"Compton wavelength of an electron, proton, and neutron:"

lambda_c:=2.42631058*10^(-12)*meter

lambda_cp:=1.32141002*10^(-15)*meter

lambda_cn:=1.3195911*10^(-15)*meter

"Classical radius of an electron:"

re_:=2.81794092*10^(-15)*meter

"Avogadro constant:"

na:=6.0221367*10^23/mole

"Faraday constant:"

f_:=96485.309*(coulomb/mole)

"Molar gas constant:"

r_:=8.314511*(joule/(mole*degree_kelvin))

"Boltzmann constant:"

k_:=1.380658*10^(-23)*(joule/degree_kelvin)

"Stefan-Boltzmann constant:"

sigma:=5.67051*10^(-8)*watt/(meter^2*degree_kelvin^4)

"Standard acceleration of gravity:"

gn:=9.80665*(meter/second^2)

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