OBJECT:
- Part I: To determine the density of two solids, one of which is heavier and the other lighter than an equivalent volume of water.
- Part II: To measure accurately the density of various liquids by means of the Westphal balance.
- Part III: To measure the specific gravity of these liquids by means of a hydrometer.
METHOD: A body is weighed in air and then immersed in a liquid. The apparent loss in weight of the body when immersed in the liquid is, by Archimedes’ principle, equal to the weight of liquid displaced by the body. 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.
Continue reading ‘Archimedes’ Principle’
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