Archimedes's Bathtub

Origin
Archimedes was a Greek mathematician,physicist,engineer,inventor and astronomist. One day King Hiero II commisioned a votive crown to be made of pure gold. when the crown was finished King Hiero doubted the gold smith and asked Archimedes to make sure the crown was made of pure gold without damaging the crown. when Archimedes took a bath he noticed the water would rise as he got in. founding this method could be used calculate density He got excited by this he forgot to dress and ran around the city Shouting "Eureka !" meaning "I have found it !"