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Fluid statics or hydrostatics is the branch of fluid mechanics which deals with the study of fluids at rest and the pressure exerted by it on an immersed object. If your question is about the study of fluids in motion, use the tag "fluid-dynamics" instead.

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How to emulate 40ft (12 m) of water?

Fit a valve onto the body of your submarine, and use a vacuum pump to pump out all the air. 1 atmosphere is equivalent to 10.3 meters (33.8ft) of water. Then you only need 6-7 feet of water to reach …
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