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LIST OF PHYSICAL CONSTANTS (cont’d)      e0 =   8.85 x 10-12 F m-1
                                         h=    6.63 x 10-34 J s
 Permittivity of free space              u=    1.66 x 10-27 kg
 The Planck constant                     mp =  1.67 x 10-27 kg
 Unified atomic mass constant            R=    8.31 J K-1 mol-1
 Rest mass of proton                     s=    5.67 x 10-8 W m-2 K-4
 Molar gas constant                      mn =  1.67 x 10-27 kg
 Stefan- Boltzmann constant
 Mass of neutron

CXC A16/U2/07v01                     94
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