# Lab 2.docx - Lab#2 Measurement of Mass Length and Time Mean...

• 4
• 83% (6) 5 out of 6 people found this document helpful

This preview shows page 1 - 3 out of 4 pages.

Lab #2: Measurement of Mass, Length, and Time Mean 1.3129 1.2266 1.3138 1.2258 St. Dev 0.0016355 0.0014318 0.00044721 0.00075829 Area of Table: 1.610 m^2 INSERT SPREADSHEET CALCULATIONS HERE Mean 0.052714 0.05154 0.023126 0.072852 St. Dev 0.000825851 0.000758584 9.37017E-05 3.96232E-05 Volume: 6.286*10^-5 m^3 Weight:0.7139 N Weight Density:1.136*10^4 N/m^3 Volume:1.586*10^-5m^ 8.285m^3 Weight:0.4562 N 0.6738 N
Weight Density:2.876*10^4N/m^3 8.132*10^4 N/m^3 Percent Difference: 182.8 percent 64.6 percent Reflection Questions: 1. You had to make a choice between the short meterstick and the long meterstick for the best length and width measurements. Why did you choose the results you did? Compare the statistical uncertainty (standard deviation) of each meterstick. If they are not the same, offer an explanation for the improved precision.
2. Compare the statistical uncertainty (standard deviation) of a collection of measurements to the precision of the individual measurem ents. Generally, what do we lose when we take multiple measurements? Why would you want to take multiple measurements of a quantity any time you can?