SOME INVENTIONS HAPPENED IN A VERY INTERESTING WAYS IN THE HISTORY OF SCIENCE. THEORY OF DISPLACEMENT - The Ancient Greek scientist was trying to find a way of determining whether a crown was made of pure gold.While pondering the problem ,Archimedes climbed into his bath and saw the water level rise.He realized that he could compare the volume of gold in the crown with a lump of pure gold of the same weight by submerging them in a fluid and comparing the rise in water level.He leap out of his bath and cried "Eureka ,Eureka."("I have found it") "Archimedes' principle indicates that the upward buoyant force ,that is exerted on a body immersed in a fluid ,whether fully or partially submerge, is equal to the weight of the fluid ,that the body displaces.Archimedes principle is a law of physi