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<p>in particular, the fluid in question is also relevant; <a href="page.php?w=seawater">seawater</a>, for example, is considered an <a href="page.php?w=incompressible_fluid">incompressible fluid</a>; its density can vary with height, but much less significantly than that of air.  Thus water's density can be more reasonably approximated as constant than that of air, and given the same height difference, the pressure differences in water are approximately equal at any height.</p>

<p><big>Hydrostatic paradox</big></p>
<p>The barometric formula depends only</p><p>
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