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Size: 2170
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Size: 2469
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| Deletions are marked like this. | Additions are marked like this. |
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| = Maxwell Demon Bottle, PIRA# = | = Maxwell Demon Bottle, 4F10.26 = |
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| * '''Cabinet:''' [:MechanicsCabinet:Mechanic (ME)] * '''Bay:''' [:MechanicsCabinetBayA2:(A2)] |
* '''Cabinet:''' [:ThermoCabinet:Thermodynamics (TD)] * '''Bay:''' [:ThermoCabinetBayB7:(B7)] |
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| The Maxwell's Demon Bottle consists of a sealed flask which contains 5 white and 5 black spheres. | The Maxwell's Demon Bottle consists of a sealed flask which contains 5 white and 5 black spheres. This demonstration demonstrate the statistical nature of an irreversible processes. Key words, Kinetic Theory, Probability, and |
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| ||apparatus||ME, Bay B1, Shelf #2|| || ||all other parts||ME, Bay B1, Shelf #2|| || ||...||ME, Bay B1, Shelf #2|| || ||Possible supplies that are needed||Rode and Tack Cabinet|| || ||...|| In Lecture Halls|| || ||...|| Stock Cabinet || || ||...|| Stock Cabinet || || |
||apparatus||TD, Bay B7, Shelf #1||**Moved from [:MechanicsCabinetBayA2:ME, Bay A2]|| |
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| 1. This Demonstration will require some practice to make it work. |
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| Maxwell's Demon can be introduced and his task illustrated in the following manner; rotate the flask in a stem up position to impart a swirling motion to the spheres. Turn the flask to the stem down position and slowly reduce the rotation rate and the balls will spiral back into the neck. With a little practice the initial array is restored. | Maxwell's Demon can now be introduced. This task is illustrated in the following manner. 1st Rotate the flask to a stem up position and impart a swirling motion to the spheres. Turn the flask to the stem down position and slowly reduce the rotation rate. The balls will spiral back down the neck of the bottle. With a little practice the initial array can always be restored, violating the 252 to 1 odds. |
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| The "demonability" resides in the fact that the black spheres are constructed so as to rapidly lose momentum (see diagram). | The "demonability" resides in the fact that the black spheres are constructed so as to rapidly lose momentum. They are hollow and contain a small ball bearing within. |
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| ||attachment other photos||attachment other photos|| ||attachment other photos||attachment other photos|| |
||attachment:MaxwellDemon-04.jpg||attachment:MaxwellDemon-01-250.jpg|| attachment:MaxwellDemon-02-250.jpg|| |
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| 1. List any references |
1. [http://lecturedemo.ph.unimelb.edu.au/Heat-Thermodynamics/Kinetic-theory/He-2-The-Maxwell-Demon-Bottle The University of Melbourne ABN] 1. [http://en.wikipedia.org/wiki/Maxwell%27s_demon Wikipedia] |
[:PiraScheme#Mechanics: Table of Mechanics Demonstration] |
[:MEEquipmentList: List of Mechanics Equipment & Supplies] |
[:Demonstrations:Lecture Demonstrations] |
Maxwell Demon Bottle, 4F10.26
Location:
Cabinet: [:ThermoCabinet:Thermodynamics (TD)]
Bay: [:ThermoCabinetBayB7:(B7)]
Shelf: #1
attachment:MaxwellDemon-01-400.jpg
Description:
The Maxwell's Demon Bottle consists of a sealed flask which contains 5 white and 5 black spheres. This demonstration demonstrate the statistical nature of an irreversible processes. Key words, Kinetic Theory, Probability, and
Equipment |
Location |
ID Number |
|
|
|
apparatus |
TD, Bay B7, Shelf #1 |
**Moved from [:MechanicsCabinetBayA2:ME, Bay A2] |
Setup:
- Begin with all the balls in the stem of the flask in the unmixed condition.
Cautions, Warnings, or Safety Concerns:
- Demonstration is a Glass Flask which can Brake
- This Demonstration will require some practice to make it work.
Demonstration:
Begin with all the balls in the stem of the flask in the unmixed condition. Inverting the flask mixes the balls and a discussion of the probability of the balls unmixing on inverting the flask again can follow. With 5 black and 5 white balls the odds against reproducing the initial array are 252 to 1.
Maxwell's Demon can now be introduced. This task is illustrated in the following manner. 1st Rotate the flask to a stem up position and impart a swirling motion to the spheres. Turn the flask to the stem down position and slowly reduce the rotation rate. The balls will spiral back down the neck of the bottle. With a little practice the initial array can always be restored, violating the 252 to 1 odds.
The "demonability" resides in the fact that the black spheres are constructed so as to rapidly lose momentum. They are hollow and contain a small ball bearing within.
attachment:MaxwellDemon-04.jpg |
attachment:MaxwellDemon-01-250.jpg |
attachment:MaxwellDemon-02-250.jpg |
References:
[http://lecturedemo.ph.unimelb.edu.au/Heat-Thermodynamics/Kinetic-theory/He-2-The-Maxwell-Demon-Bottle The University of Melbourne ABN]
[http://en.wikipedia.org/wiki/Maxwell%27s_demon Wikipedia]
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