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Given three "slabs" of material with cross section areas A, consider the force on the central slab due to the
pressures from the slabs below and above it,
If the slab has mass m, density  , and is acted upon by gravitational acceleration g,
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(4) |
so
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(5) |
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(6) |
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(7) |
This is the hydrostatic law.
 Hydrostatic Equilibrium, Law of Atmospheres, Pascal's Principle, Pressure Scale Height
© 1996-2007 Eric W. Weisstein
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