OBJECT: To determine the densities of a solid and a liquid by using Archimedes’ principle and a Jolly balance.
METHOD: A body is alternately weighed suspended in air and immersed in a liquid. The apparent loss in weight of the immersed body is known, by Archimedes’ principle, to equal the weight of liquid displaced by the body. The apparent less in weight is measured by means of a spring. From these measurements the density and specific gravity of either the solid body or the liquid may be determined.
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OBJECT: To study Archimedes’ Principle and to apply this principle to determine the density of solids and liquids.
METHOD: A body is weighed in air and then weighed when submerged in a liquid. The apparent loss of weight is, by Archimedes’ Principle, equal to the weight of the liquid displaced by the body. From these measurements, the density and specific gravity of the solids and liquids used in the experiment may be determined.
THEORY: The fact that an object immersed in a fluid, liquid or gas, should be “buoyed up.’ by a force equal to the weight of the fluid it displaces was deduced by Archimedes (287-212 BC). This principle, called Archimedes’ Principle applies to any object in any fluid, for example, a submarine in water or a dirigible in air.
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