Archimedes' theorem

Archimedes' theorem, also known as the principle of buoyancy, states that any object fully or partially submerged in a fluid experiences an upward force equal to the weight of the fluid it displaces. This means that objects will float or sink based on their density compared to the fluid. If an object is less dense than the fluid, it will float; if it's denser, it will sink. This principle explains why boats float on water and is fundamental to understanding how various objects behave in fluids.