Otherwise, it floats. The formal statement of Archimedes' Principle is this: the buoyant force acting on an object placed in a fluid is equal to the weight of the fluid displaced by the object. Suppose that the wood block in the example above has a volume of 1 cubic foot. A cubic foot of water weighs about 62.4 pounds.therwise, it floats. The formal statement of Archimedes' Principle is this: the buoyant force acting on an object placed in a fluid is equal to the weight of the fluid displaced by the object. Suppose that the wood block in the example above has a volume of 1 cubic foot. A cubic foot of water weighs about 62.4 pounds.
Freebase(0.00 / 0 votes)Rate this definition: Epicenter. The epicenter or epicentre is the point on the Earth's surface that is directly above the hypocenter or focus, the point where an earthquake or underground explosion originates.
A hypocenter (or hypocentre) (from Ancient Greek: á½ÏÏÎºÎµÎ½ÏÏÎ¿Î½ [hypÏkentron] for 'below the center') is the point of origin of an earthquake or a subsurface nuclear explosion. It is a synonym of the focus.[1] The term hypocenter is also used as a synonym for ground zero, the surface point directly beneath a nuclear airburst. Earthquakes. An earthquake's hypocenter is the position where the strain energy stored in the rock is first released, marking the point where the fault begins to rupture.