course Phy 202
I assumed after my prelim observ that I was supposed to do exp 3 under the kinmodel experiment since you did not assign another experiment.
Experiment kinmodel_03: Equipartition of energy and the direction of disorder to (increasing or decreasing)Observe the first several seconds of the simulation at the 'slow' default speed. You will see how the particles initially are all moving in or very close to the x direction, with little or no y component. Note the x and y kinetic energies, displayed near the top of the screen.
Your work has been received. Please scroll through the document to see any inserted notes (inserted at the appropriate place in the document, in boldface) and a note at the end. The note at the end of the file will confirm that the file has been reviewed; be sure to read that note. If there is no note at the end, notify the instructor through the Submit Work form, and include the date of the posting to your access page.
?Observe what happens to the directions of motion of the particles as they start colliding.
They began to change. Once hit the particles would often go in the opposite direction.
?Observe what happens to the x and y kinetic energies.
They are constantly changing with the collisions.
?Is the system more organized at the beginning of the simulation or after a couple of minutes?
I thought it was hard to judge the organization of the system but I think it was more organized at the beginning.
?If the x and y kinetic energies were averaged for 100 years, starting a few minutes after the simulation began, which do you think would be greater?
I think the x kinetic energies would be greater.
Run the simulation in this manner several times, and each time determine how long it takes before the total y kinetic energy is first greater than the total x kinetic energy. Report your results.
About 20 seconds
Now take some data:
?Running at the fastest default speed, stop the simulation with the pause/break key every few seconds, keeping your eyes closed for at least 2 seconds before stopping the motion.
?Write down the x and y kinetic energies each time.
?Do this at least 30 times.
?Find the average of all your x and all your y kinetic energies.
KEx KEy
351.8 372.4
475.2 280.6
321.7 443.1
343.8 398.0
393.7 368.7
345.7 434.0
349.8 372.6
477.0 295.6
509.5 248.1
385.8 372.6
332.8 426.4
350.4 377.6
423.6 340.5
455.0 304.8
404.2 325.6
443.7 305.2
393.3 357.1
338.8 428.9
415.6 347.5
297.9 438.5
397.4 383.5
474.0 288.4
325.5 438.4
374.7 394.6
481.3 285.8
327.4 359.2
479.3 261.6
340.4 370.9
387.4 383.4
343 428.6
Average: KEx = 391.4 KEy = 348.3
?Do you believe the difference in the averages is significant, in that the direction that has the higher average will always tend to have the higher average every time the simulation is run?
I do think it is significant because over 30 trials though it wasn? always higher the average was 43.1 higher. It would be best to find a p value from the data to determine significance.
"
Good. Go ahead and do #3 on this series of experiments.