Although, for convenience we have considered a cube totally imersed in the liquid, the same argument applied to any shaped body immersed or even partially immersed in a liquid. Suppose a body weighs W in air, W W in water, and W L in some other liquid. Now suppose that we have a body that is less dense than water, such as cork. A sinker whose density is greater than that of water must be attached to the cork so that the cork may be weighed in water. If w is the weight of the cork in air, w 1 the weight of the cork and sinker with only the sinker immersed in water, and w 2 the weight of the cork and sinker when both are immersed in water, then w 1 - w 2 is the loss in weight of the cork when immersed in water.
Procedure First check the balance to see that it swings uniformly when lightly displaced.
Measure the specific gravity of alcohol directly by using the hydrometer. Calculations Calculate the quantities W, W L , and W W in Newtons by multiplying the values in grams by 0.0098. Explain how Archimedes' principle is used in the operation of a submarine. A 5 kg metal body is attached to the end of a spring balance and is immersed in water. Dr. John Askill, Millikin University, 1999.