Measuring diameter and circumference. Measure, do NOT calculate, the diameter AND circumference of each item listed. Each member of the lab group is to do his/her own independent measurement. On a sheet of notebook paper, record all measurements and then calculate an average value for each set. You and your partner need to be consistent with your measurements so that you always have the same number of decimal places on all values.
Description

Diameter

Circumference


Partner 1

Partner 2

Average

Partner 1

Partner 2

Average

pen case







washer







soda can







inside of tape







coffee can







top of plate







bicycle wheel




























Graphical Analysis
EXCEL will now graph your data. Minimize your browser, double click My Computer, double click the shared drive on Lederman, double click your period's folder and then finally double click 1circumference.xls. You will most likely be asked to open the file as "read only"  that is fine. As soon as the file is open, use File Save As to rename the file as
LastnameLastnameCircumference.xls
in your period's folder. This copy of the file now belongs uniquely to your group. Remember that there are to be no spaces in the file name. Input your final AVERAGE values for Diameter and Circumference. Diameter, measured in cm; will be placed on the xaxis and Circumference, measured in cm, will be placed on the yaxis. As you enter your data, your graph will grow. When the graph is finished, be certain to investigate any points that are obviously outofline. Recheck them for accuracy  initially as a error in typing; otherwise go back and remeasure. When you data fits nicely, resave and print your graph from my teacher station. Student stations do not have permissions to print to a local or network printer. Error Analysis The value for the slope should be close to π (π =3.14159265). Calculate the accuracy of your experimental measurements by finding the percentage error for your experiment. This done by using the following formula
and should be shown on your graph's printout. On your graph, do not just give me the final numerical value, show me your calculation. 