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Branch of physics that deals with the characteristics of fluids at rest, particularly with the pressure in a fluid or exerted by a fluid (gas or liquid) on an immersed body. In applications, the principles of hydrostatics are used for problems relating to pressure in deep water (pressure increases with depth) and high in the atmosphere (pressure lessens with altitude).
This entry comes from Encyclopædia Britannica Concise. For the full entry on hydrostatics, visit Britannica.com.