Credit: Bradley W. Carroll, Weber State University
The apparent loss in weight of a body totally or partially immersed in a liquid is equal to the weight of the liquid displaced. Archimedes supposedly formulated this principle after stepping into a bath and watching it overflow. According to legend, he became so excited that he ran out into the street naked shouting "Eureka! Eureka" ("I've found it! I've found it!") See also buoyancy.