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Unformatted text preview: Digital balance Graduated Cylinder (Sample 2) Graduated Cylinder (Sample 1) Hydrometer Beaker Metal specimen and cork Reading will be here Hydrometer Unknown Liquid Sample Graduated Cylinder B W W W A Abstract. This experiment focuses on Archimedes Principle. Upon making a deep sight on the principle, an application is to be performed which is the determination of the specific gravity of materials such as solids and liquids that are maybe denser or less dense than water. The experiment is divided into four major parts which are the determination of the specific gravity of (1) an unknown solid sample heavier than water, (2) an unknown liquid sample, (3) unknown liquid sample using a hydrometer, (3) a solid lighter than water. The primary step would be the recording of weight of the sample at air and when it is immersed in a liquid. Variation of this step is done to meet the necessary data needed. After the experiment, we may be able to differentiate specific gravity from density and how are they related to each other. Also, we may know what a buoyant force is and what is its relation with mass of the displaced liquid. Finally, we may be able to relate the Archimedes principle with the specific gravity. Introduction According to Archimedes Principle, when an object is either partially or completely immersed in fluid, it experiences an upward force (up thrust) equal to the weight of the fluid displaced by the immersed object. Objects in a fluid seem to weigh less than they do because of a concept called buoyancy. It is the tendency of a liquid to exert an up thrust on an object place in it which makes it float or rise. Buoyancy occurs because the pressure of a fluid increases with depth. On the other hand, the term used for the force experienced by the submerged object is called the buoyant force. A great scientist of ancient Greece named Archimedes is responsible for this discovery. His principle explains why some objects, like wood or plastic, float in water when others, such as metals, sink. Imagine we suspend an object in a string, while it is immersed in a container of water. Because the object is at static equilibrium, the net force is just equivalent to zero (First Condition of Equilibrium). + - = Wapparent B W 0 W apparent is the apparent weight of the object when it is displaced in water (or tension in the spring) while W is the actual weight of object (weight at air) and B as the buoyant force. Figure describing this equation is shown below: Figure . Archimedes PrincipleFigure ....
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This note was uploaded on 04/27/2011 for the course PHY 11L taught by Professor Agguire during the Spring '11 term at Mapúa Institute of Technology.
- Spring '11