ಹಡಗುಗಳ ನಿರ್ಮಾಣ ಮತ್ತು ಚಲನೆ ________ ಅನ್ನು ಆಧರಿಸಿದೆ.

Ships float because of Archimedes' principle: an object in a fluid feels an upward buoyant force equal to the weight of fluid it displaces. A ship's hollow hull displaces enough water to balance its weight.