Constants and Measurement Units 291
Constants
ConstantsConstants
Constants
Description Value
_c speed of light 2.99792458E8_m/_s
_Cc coulomb constant
8.9875517873682E9_N
ø_m
2–
/_coul
2
_g acceleration of gravity
9.80665_m/_s
2
_Gc gravitational constant
6.6742E
‘M11_m
3
/_kg/_s
2
_h Planck’s constant
6.6260693E
‘M34_Jø_s
_k Boltzmann’s constant
1.3806505E‘M23_J/_¡K
_Me electron rest mass
9.1093826E‘M31_kg
_Mn neutron rest mass
1.67492728E‘M27_kg
_Mp proton rest mass
1.67262171E‘M27_kg
_Na Avogadro’s number 6.0221415E23 /_mol
_q electron charge
1.60217653E
‘M19_coul
_Rb Bohr radius
5.291772108E‘M11_m
_Rc molar gas constant
8.314472_J/_mol/_¡K
_Rdb Rydberg constant 10973731.568525 /_m
_Vm molar volume
2.2413996E
‘M2_m
3
/_mol
_H0
permittivity of a vacuum
8.8541878176204E‘M12_F/_m
_s
Stefan-Boltzmann constant
5.670400E
‘M8_W/_m
2
/_¡K
4
_f0
magnetic flux quantum
2.06783372E‘M15_Wb
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