Archimedes’ Principle and Specific Density
ARCHIMEDES’ PRINCIPLE AND SPECIFIC DENSITY
GOAL: To investigate buoyant force and Archimedes’ principle. To measure the specific density of several materials. INTRODUCTION: Try pushing down on a basketball in water and you feel the buoyant force that makes the ball float. As more of the ball is pushed beneath the water, the upward force becomes greater. One could make a first guess (Hypothesis #1) that the buoyant force increases with the submerged volume of the object. A more mathematical guess (Hypothesis #2) might be that the upward or buoyant force, B, is proportional to the submerged volume, Vsub, of the object. feathers, is in fact a statement that the density of lead is greater than the density of …show more content…
Figure 2 The pan balance method for measuring the buoyant force and specific density. METHOD III. (Graduated Cylinder Method) Determine the mass of the empty graduated cylinder and an average mass for the washers. Place about 10 washers in the graduated cylinder, and carefully place the cylinder in the beaker which is about 2/3 full of water. This initial loading with washers should insure that the cylinder floats upright, if not add more washers. Be careful not to have air bubbles under the base of the cylinder. Record the number of washers and volume markings on the graduated cylinder at the waterline as the cylinder floats. Add a washer, and record these values again. Repeat this process of adding washer and recording up to the point of sinking the cylinder. Plot volume marking vs number of washers
METHOD II. (Pan

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