The slope of the above graph represents the density. D=m/v (the density formula) is linear when you graph it so since this graph represents density it will also be linear.
Determining Density Lab Documentation
Part 1:
In this picture, I am calculating density while Kyle records volume. Density is calculated by solving its formula which is; D=m/v, Density=mass/volume. We calculated volume by both direct (physically touching a tool to the work to get a measurement and then calculating volume using the specific shapes formula)and indirect (calculating by putting the part in liquid, subtracting the number of liquid after the part is put in from the amount of liquid before the part was in) methods. This picture counts for both part one and two because Kyle was recording the volume calculated indirectly while I was filling out the density calculations. Both parts one and two are similar because we are calculating density. In part 1 we calculated density directly as described above, in part 2 we calculated density indirectly (also described above).
We had to convert lbs/in^3 to g/cm^3 because the mass we were using was in lbs and the volume was in inches cubed but the published values for density we had were in g/cm^3. In order to compare the two values we had to convert. We were within +or- 10% of the published values consistently.
This lab taught me more how to get one page done with two people than anything else. Kyle and I figured out how to both be working and share a paper for the entire project. The most accurate way to determine density is to calculate it indirectly because it is very hard to screw addition and subtraction up when compared to using pi and other forms of math.