For Archimedes' Principle we have terms and definitions in 3 topics. The topics are Climatology, Explosives and Sanitation.

A net upward or buoyant force, equal in magnitude to the weight of the displaced fluid, acts upon a body either partly or wholly submerged in a fluid at rest under the influence of gravity. Named for Archimedes (287-212 BC), a Greek mathematician who discovered the principle.
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The Archimedes' principle states that a body immersed in a fluid is buoyed up by a force equal to the weight of the displaced fluid. The principle applies to both floating and submerged bodies, and to all fluids. It explains not only the buoyancy of ships but also the rise of a helium-filled balloon and the apparent loss of weight of objects underwater.
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The principle of buoyancy, stating the resultant force on a wholly or partly submerged body acts vertically upward through the center of gravity of the displaced fluid and is equal to the weight of the fluid displaced.
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