8.308
8.930
6.97
Calculations:
Measurements
1-3

Measurements
1. Measure the mass of all objects.
o
For this, each object was placed on a scale that, in grams, measured the object’s mass.
2. Compute the volume of all objects.
o
Using the following equations, each type of object was measured
LxWxH
V
Cube
Example: (Iron Cube) V = 2.56 *2.56*2.55 = Volume = 16.71 cm
3
3
r
3
4
V
Sphere
Example: (Aluminum Sphere) V = 4/3*∏*(2.530)
3
= Volume = 8.479 cm
3
L
r
V
2
Cylinder
Example: (Brass Cylinder) V = ∏*(0.61)
2
*5.08 = Volume = 5.94 cm
3
3. Compute the densities of all objects.
o
Using the following equation, the density of these objects was found:
V
m
Example: (Iron Cube)
= 128.8/16.71 = 7.708g
Example: (Aluminum Sphere)
= 23.4/8.48 = 2.759g
Example: (Brass Cylinder)
= 54.7/5.94 = 9.209g
4. Compute the percent error for each metal in calculation three above.
Conclusion
After completeing this experiment and finding my experimental volume and density, and
comparing that information with the known values for the materials, I was able to see how well
my lab partners and I were able to find that our calculations were not as acurate as we hoped,
but most calculations were still fairly close to the known values (as referenced in Data Table VI).
If there were any way to improve our calcuations, it would be that we would reattempt a
measurement if it is not close to the other calculations made by the rest of the group. These little
errors, effected our group average and evidentaully our final volume and density calculations.
1-4
Measurements

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