Experiment $13$: Archimedes$$ Principle Purpose $(1)$ To observe Archimedes$$ Principle aka the buoyant force. $(2)$ To measure densities of a liquid and solid. Apparatus Laboratory Balance, Dial Calipers; a box of samples and a wooden rod; beakers; a graduated cylinder vessel; a supply of liquids; cleaning supplies. Theory $($A$)$ Archimedes$$ Principle $$An object immersed in liquid, fully or partially, experiences an upward buoyant force. This force is equal to the weight of the volume of liquid displaced by the object.$$