Physical constants:

Mass of an electron (Me) = 9.1×1031kg.

Mass of a proton ( Mp) = 1.6725 x 1027kg.

Mass of a neutron (Mn) = 1.6746 x 1027kg.

Charge of an electron (e) =–1.6 x 1019c

Speed of light in vacuum (c) = 3 x108 m/sec.

Planck Constant (h) = 6.6256 x 1034 J x sec .

Universal Gravitation constant (G) = 6.67 x 1011 Nm2/ kg2.

Avogadro Number (NA) = 6.023 x1023mol1.

Boltzmann constant (K) = 1.38 x 1023 J/K
10.Stefan Constant (σ) = 5.67 x 108 W m2 K4.
11.Wien Displacement Constant (b) = 2.898 x103m K
12.Solar Constant (S) = 1.388 x 103 W m2
13.Mass of the sun (MS) = 2x 1030kg.
14.Mass of the earth (ME) = 5.98x 1024kg
15.Radius of the earth (Re) = 6400 Km. = 6.4×106m.
16.Density of earth 5.522×103kg/m3.
17.Average angular velocity of the earth = 7.29x 105rad./sec
18.Average distance between the sun and earth = 1.5×1011m.
19.Average distance between moon and the earth =3.84x 108m.
20.Magnetic Moment of the earth = 6.4x 1021 Amp. X m2.
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