Explanation:
(a) The given data is as follows.
Water volume V = 1
At weight of water w = 62.3 lbf
It i s known that 1 lbf = 32.174
Then, weight w = = 2004.4
Weight =
where, g = gravitational acceleration in earth
and, Mass =
= 2004.4 lbm. ft. s-2
=
Density =
Hence, density of the water will be .
(b) When g = 6 at moon then density and volume are not variable due to gravity.
weight (w) =
w =
= 373.8
Hence, weigh on the moon is 373.8 .
(c) Mass of any body is independent of the gravity, so density of the water is same as when it is at moon or earth.
Only weight of the body changes due to change in gravity.
It is known that 1 cubic miles = us liquid gallon
and, 1 bbl = 42 US gallon
Therefore,
Hence,
total cubic miles =
= 1.144 cubic miles
Thus, we can conclude that its density on the moon is 1.144 cubic miles.