Geography Reference
In-Depth Information
APPENDIX A
Useful Constants and
Parameters
10
−
11
Nm
2
kg
−
2
Gravitational constant
G
=
6.673
×
9.81ms
−
2
Gravity at sea level
g
0
=
10
6
m
Mean radius of the earth
a
=
6.37
×
10
−
5
rad s
−
1
Earth's angular speed of rotation
=
7.292
×
R
∗
=
10
3
JK
−
1
kmol
−
1
×
Universal gas constant
8.314
287 J K
−
1
kg
−
1
Gas constant for dry air
R
=
Specific heat of dry air at
constant pressure
1004 J K
−
1
kg
−
1
c
p
=
Specific heat of dry air at
constant volume
717 J K
−
1
kg
−
1
c
v
=
Ratio of specific heats
γ
=
c
p
/c
v
=
1.4
18.016 kg kmol
−
1
Molecular weight of water
m
v
=
491
