CSIR
-NET
118.
The densities of the Earth and Mars are in the ratio 14:10. The rate
of decrease of the gravity field of Mars on its surface with
elevation would be..
A)0.31gal/km
B) 0.25gal/km C)0.22gal/km D)0.10gal/km
Solution:
Earth,
In
free air correction, the gravity decreases with elevation increases.
The
rate is =0.3086 mgal/m
=
0.3086 gal /km
The
densities of the Earth and Mars are 14:10
Earth
14---------------0.3086 gal /km
Mars
10 ------------------?
cross
multiplication ,
(14
* x )= (0.3086 * 10)
x=
3.086 / 14
In
Mars =0.2204 gal/km
Answer:C
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