Archimedes' Principle Experiment

Topics: Density, Buoyancy, Water Pages: 4 (885 words) Published: January 16, 2013
De La Salle Health Sciences Institute
General Education Department
City of Dasmariñas, Cavite, Philippines


Archimedes Principle

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Sophomore students from Occupational Therapy in De La Salle Health Sciences Institute had conducted an experiment concerning Archimedes’ Principle to determine the density of solids and liquids using Archimedes’ Principle. For the density of solids, they had made use of spring balance to measure the mass of the metal samples, which were tied via string, in air and when immersed inside a 2000mL beaker, where H2O lies. They had computed the density of each sample metal using the formula: ϱs = maϱw / ma - mw and computed a percentage error. As for the density of liquids, they had filled a graduated cylinder with 250mL liquid sample and had immersed a hydrometer. They had immersed a sample metal in the liquid sample and had measured its mass in air and beneath the liquid. They also had measured the volume of displaced liquid as the metal sample is immersed in the liquid and had computed the density using the formula: ϱL = WaWL / gV, and the percentage error after. They had been successful to support the theory of Archimedes and had came up with percentage error ranging from 5.76% to 9.91%.

Tradition tells us that the king was suspicious about the purity of the gold in his crown and asked Archimedes to find a way to determine if it was the real thing. Solving the problem seemed to be impossible because in those days (3rd century B.C.) nothing was known about chemical analysis. One day Archimedes was thinking about the problem while taking a bath. As he lay floating in the bathtub he thought about his "weightless" body. Suddenly he realized that all bodies "lose" a little weight when placed in water, and the...
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