Mariner9,
Forget about all this pressure differential theory. Simplify the problem. We have a sealed aluminum cylinder containing atoms. Some atoms form geese and some form air – and no doubt they are all in motion. If the atoms with a greater mass move towards one end of the cylinder then it will tip the balance in that direction.
Supposing our cylinder is football shaped. We fill it with atoms from two metals, aluminum and lead in molten form. Suppose too that the lead atoms congregate at one end of our football shaped cylinder. Will it sit level or will it tilt in the direction of the heavy metal? That is the big picture!
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dragchute
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