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Hydrostatics
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====Heron's fountain==== {{Main|Heron's fountain}} [[Heron's fountain]] is a device invented by [[Heron of Alexandria]] that consists of a jet of fluid being fed by a reservoir of fluid. The fountain is constructed in such a way that the height of the jet exceeds the height of the fluid in the reservoir, apparently in violation of principles of hydrostatic pressure. The device consisted of an opening and two containers arranged one above the other. The intermediate pot, which was sealed, was filled with fluid, and several [[cannula]] (a small tube for transferring fluid between vessels) connecting the various vessels. Trapped air inside the vessels induces a jet of water out of a nozzle, emptying all water from the intermediate reservoir.{{cn|date=July 2022}}
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