Ar·chi·me·des' principle
variants:
or less commonly Archimedes' Principle \ ˌär-kə-ˈmē-(ˌ)dēz-ˈprin(t)-sə-pəl , -bəl \
Definition of Archimedes' principle
: a law of fluid mechanics: a body while wholly or partly immersed in a fluid apparently loses weight by an amount equal to that of the fluid displaced
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The first known use of Archimedes' principle was in 1859
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