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course Phy 202
3/31 11 am
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.
Observe what happens to the directions of motion of the particles as they start colliding.
Observe what happens to the x and y kinetic energies.
Is the system more organized at the beginning of the simulation or after a couple of minutes?
after a couple of minutes
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?
close to being even
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.
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.
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?
x y
1543 1927
2029 1259
1073 979
1174 1754
1819 1549
1595 1290
1629 1343
1510 1457
1597 1016
1477 1187
1573 1546
963 1359
1105 1722
1181 1878
1271 1662
1643 1140
1142 1323
1731 1055
1368 1492
1145 1584
1824 1422
1651 1331
1969 871
1154 1941
1280 2124
1090 1678
1152 1848
1579 1485
1433 1474
1313 1851
The averages are x=1433.767 and y=1485.9, which makes the averages not significant and tells me that the averages would probably stay
around the same range every time the simulation is run. So no direction is preferred in the program, random.
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&#This lab submission looks very good. Let me know if you have any questions. &#