Help Page
General
This educational module wasdesigned to help you learn about any
terms or concepts related to the Maxwell-Boltzmann
distribution that you may find confusing. If you have reached
a point that is confusing, try the following suggestions:
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Visit pages that are linkedto the page that confuses you. Additional explanation may be found
on these pages.
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Return to the previous pagewith the left arrow.
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Visit the Home page, and see
if the outline of web pages offers any topics related to your confusion.
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Send us (the web page authors)
email feedback. We actively revise these pages in response to student
concerns.
Applet Help:
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Once JAVA and the applet have
loaded, the word GO! will appear. Click on it.
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Before starting the simulation,
choose the number of particles and temperature from pull-down menus.
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The SIMULATION box shows atoms
of a gas in a container. The atoms are all argon atoms. The
different colors represent atomic speeds, with fast-moving atoms colored
violet or blue, and very slow-moving ones colored red.
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When the simulation starts,
the atoms will move and collide with the walls and each other.
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The container is three-dimensional,
so the atoms get smaller and dimmer as they move away from you.
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Click on "Start" to begin the
simulation. "Pause" will halt the simulation temporarily. Click
on "Pause" again to resume the simulation. "Reset" will terminate
the simulation.
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Click on "Step" to step through
each iteration slowly. This will allow you to see the initial distribution
and watch its development. Click on "Step" again to let the simulation
proceed rapidly.
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In all simulations, one atom
is colored white. The graph below the box of atoms displays the
speed of this white atom. This makes it easy to see changes in
speed for this atom.
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The ideal Maxwell-Boltzmann
distribution is shown as a magenta curve. As the atoms move, their
speeds are tabulated and the histogram is shown in blue. The histogram
is continuously normalized.
Troubleshooting:
This applet
requires at least Netscape 4 or IE 4. Also, please make sure
that JAVA is enabled in your browser.
Here
is a table listing various timings for a 1000K run with 10 atoms for 10,000
iterations:
Platform/Chip
Speed
|
Browser
|
Time (s)
|
Macintosh 7100/66MHz
|
Netscape 4.5
|
55
|
Macintosh G3
|
Netscape 4.06
|
21
|
Pentium II
|
Internet Explorer 4.01
|
14
|
Pentium II
|
Netscape 4.05
|
11
|
|