![Picture](/uploads/2/6/6/8/26684727/1401656712.jpg)
Lab Partners: Ben Ronemus, Michael Perkins, Kyle Troch
Date Completed: May 22, 2014
Date Completed: May 22, 2014
Purpose
The purpose of the lab was to measure the density of a variety of liquids. We had to accomplish this by knowing the mass and the apparent mass of a cube. Once we knew the two masses we could use Archimedes' Principle to find the liquids' densities.
Theory
Archimedes' Principle states that buoyant force on a body immersed in a fluid is equal to the weight of the fluid displaced by that object. In our equations we used m' to stand for apparent mass. Apparent mass is what an object appears to weigh in a liquid because liquids have a buoyant force that counteracts gravity. This would make the mass appear to be less even though it has the same mass. In addition to using equations from Archimedes' Principle we used the density equation.
Experimental Technique
We could measure the mass and apparent mass of the cube by using a hanging device attached to a balance. To find apparent mass however we had to submerge the object in one of the liquids to measure it. After we found the two different masses we could put those into our equation to find the density of each liquid. Then we poured the liquids into individual graduated cylinders to measure the volume and mass of the liquids. Once we knew those two measurements we could calculate the liquids density using the density equation that way we could compare our measured density to the actual density.
Blue Liquid Yellow Liquid
Green Liquid Purple Liquid
Data and analysis
Conclusion
The purpose of the lab was to find the density of different liquids using the mass and apparent mass of an object. After completing the lab, we found that this lab was very successful. We were able to measure the density of each liquid and calculate the density of each liquid so we can compare the densities. In the end the densities were almost identical. The answers were very very close, so I feel like this was a very successful lab. Some of the things that could cause error were air bubbles in the fluids, evaporation, and the meniscus in the graduated cylinder. We were still able to get answers that were very close. The yellow and green liquids did not have a percent difference. While the blue and purple had a percent difference of only .2%. All in all this was a very successful lab that gave very accurate answers.
References
http://physics.weber.edu/carroll/archimedes/principle.htm
References
http://physics.weber.edu/carroll/archimedes/principle.htm