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
You've reached the end of your free preview.
Want to read all 4 pages?