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COLLEGE PHYSICS LABORATORY EXPERIMENT DENSITY OF WATER OBJECTIVES • Verify that the mass of a substance is directly proportional to its volume. • Determine the value for the density of water at room temperature. THEORY When we measure the mass Mw of a given volume Vw of water, their ratio Mw /Vw ≡ ρw is observed to be a constant known as the density of water. At room temperature (∼ 20 Co ), the density of water is −3 ρth w = 1.00 g cm MATERIAL & PROCEDURE Method I Method II • Material - 600 mL beaker - 100 mL graduated cylinder - triple-beam balance (1g) • Material - 100 mL graduated cylinder - 5 mL pipette - electronic balance (0.01g) • Procedure - Measure mass of 50 mL water - Repeat with increments of 50 mL - Record data (volume & mass) • Procedure - Measure mass of 5 mL water - Repeat with increments of 5 mL - Record data (volume & mass) DATA ANALYSIS • Graph Mass versus Volume using data from both procedures • Compute mean value and standard deviation for water density for each procedure • Compute percent error and percent uncertainty for each procedure