Decks rise like a stacked skyline above the waterline, yet the hull does not disappear beneath the waves. A cruise ship floats because water pushes upward with a force equal to the weight of the water it displaces. That upward push is described by Archimedes’ principle, not by luck or scale.Steel itself is denser than water, but the ship is not a solid block of metal. The vast hull encloses air, c...More