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Dec27-12, 03:02 PM
berkeman's Avatar
P: 41,106
Quote Quote by genergy View Post
Buoyancy is an artifact of gravity that moves mass up away from the center of the earth in a fluid whenever the specific gravity of the object is less than the surrounding fluid.
Buoyant Force is calculable.
Gravitational Potential Energy is calculated by the formula: mgh
Is Buoyant Potential Energy calculated mg'h?

Here is how I have calculated it so far;
mass = 100,000 kg
height or depth = 100 meters
g' = 1 - (1000 / 1028) = 1 - 0.97276265 = 0.02723735
(The density of the solid object is 1,000 kg/m. The density of the fluid is 1,028 kg/m)

By this calculation the Buoyant Potential Energy would be 272,373.54 Joules

Is this correct? Could it be improved on?
The units of density would be kg/m^3, not kg/m as you show.

BTW, would there be more "bouyant energy" stored if you pushed a solid object down to a depth, or pushed an air-filled object down, where the object shrinks in size as it gets to greater pressures at lower depths?