what is the upward force on the bottom of an empty underground storage tank caused by a groundwater depth of 5 feet above the tank bottom? the tank is 8 feet wide and 16 feet long.
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This is a Physics problem, I must say. According to the Archimedes Principle, any body immersed in some fluid receives a upward force equal to the weight of the moved fluid. See Buoyancy.
Considering the tank to be prismal, it moved a voume of water of of water. As one liter of water weights aproximately one kg,