1. Do you see a relationship between final speed and time in the arena? What is the relationship? What happens to the average speed as time in the arena increases?

2. How would you investigate this relationship graphically, that is, what would you select for your independent and dependent variables?

Use the provided graphing function to compare your dependent and independent variables. Reproduce your graph in your lab packet.

3. What general shape do your data points resemble?

4. If your graph is not linear, how would you change the variables to produce a linear relationship? Once you have established a linear relationship, use the regression function (click on the Regression button) to display slope, intercept, and correlation for your graph. Reproduce your graph in your lab packet.

5. What is the mathematical relationship between your independent and dependent variables? (Remember this ain't just math, include variables!) Record this relationship in your lab worksheet.

6. What is the intercept of your graph? Is this intercept significant? Why or why not?

7. What is the slope of your graph? What physical quantity does this slope represent?

1. What is the final relationship between your variables?

2. What happens to the speed of the cosmic ray as a result of interactions with massive objects? What happens to the cosmic ray momentum?

3. Using your conclusions from Lab Three, what (if anything) would happen to the speed, and momentum of the massive objects? If there was a change, do you think it would be noticeable? Why or why not?

4. What would happen to the kinetic energy of the cosmic ray? What phenomena on Earth have you viewed that supports your answer to this question?

5. The Cosmic Ray High Resolution Laboratory in Dugway, Utah has observed cosmic rays in the Earth's atmosphere of ten joules or higher. Using your knowledge of kinetic energy, calculate the velocity of a cosmic ray (mass of 6^10-26 kg) with an energy of ten joules. Is there any physical problem with this speed?