Question: Resource: http://phet.colorado.edu 1 1. Determine the variables: a. Independent Variable: b. Dependent Variable: c. Constant Variable(s): 12. Make a line graph of your data. Remember

Resource: http://phet.colorado.edu

1 1. Determine the variables: a. Independent Variable: b. Dependent Variable: c. Constant Variable(s): 12. Make a line graph of your data. Remember to: Use equally-spaced intervals; Place numbers at a LINE (not between the lines); Label both axes with words (the column titles from your data table); Title y vs x 13. How does the number of U-235 atoms affect the percentage of U-235 atoms fissioned? 14. Using your observations in this simulation, explain why your answer to #13 makes sense. 15. Based on your experiment, what isotope of uranium is used in a nuclear reactor? b. Why must that be the case? 16. Use the internet to discover what percentage of natural uranium is U-235. b. Explain why uranium mines do not start a chain reaction and blow up

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