Also known the Law of Buoyancy, the Archimedes' Principle states that any kind of body which is immersed in any kind of fluid is subjected to an exerted upward force that is equal to the weight that is displaced by the body. This upward force is called “buoyancy". The formulation of this principle is said to have come from a personal experience of Archimedes where he observed that he displaced water when he stepped into a bath. This legend also involves him rushing out from the bath and out into the streets while yelling “Eureka!" which is the Greek word for the phrase “I have found it!