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Archimedes wrote about this experiment in his book, On Floating Bodies. The celebrated seventeenth century astronomer and physicist, Galileo Galilei was a big admirer of Archimedes. Galileo once wrote “ …to those who have read and understood the very insidious inventions of this godhead serviceman in his own writings ; from which one most clearly realizes how inferior all other minds are to Archimedes ’ … ” In fact, in the 1600s ( seventeenth hundred A.D. ), Galileo verified Archimedes ’ find ( the eureka ! moment ) with preciseness, using his own, a slightly different method acting, where he balanced a peak made of “ impure aureate ” on a scale against a stripe of pure gold in air, and then the scale is submerged with crown and gold in water to see if they silent remainder. In Galileo ‘s design, if the crown was made of saturated gold, the buoyant forces on the crown and the gold bars would be the same and the balance would remain horizontal. This would happen because Archimedes ‘s principle states that the lapp burden of the lapp substance must occupy the same book, whatever the shape. If the pate was impure, it would have a slightly larger volume than one of arrant aureate ( remember, since silver is less dense than gold, it takes up more space than the equivalent burden of gold ). Immersed in water, a larger-volume crown would be buoyed more than the equal gold barroom ; this would cause the libra to tip, with the crown side higher than the side containing the pure aureate bar. In Physics, this Archimedes ‘ Eureka moment is called the Archimedes Principle, which states that when a body is immersed in a liquid, it experiences an up buoyant force, which is equal to the weight unit of the liquid displaced by the body. In fact, airiness explains why some objects float, and others do n’t. For example, a testis of steel, will sink because it ‘s ineffective to displace water that equals its weight. But steel of the lapp weight but shaped as a bowl will float because the weight unit gets distributed over a larger area and the sword displaces water equal to its weight. This is how large ships that weigh respective thousand tons float in the ocean. For more details and to conduct a demonstration experiment to verify the Archimedes Principle, contact Dr. Akhtar Mahmood ( amahmood @ bellarmine.edu ). By the way, whenever you have a great mind or managed to solve a hard physics or a mathematics problem, you may run up and down the hallway of Siena Quarto and abuse “ Eureka ! constantan ! ” arsenic loud as you can .