[:PiraScheme#Mechanics: Table of Mechanics Demonstration] |
[:MEEquipmentList: List of Mechanics Equipment & Supplies] |
[:Demonstrations:Lecture Demonstrations] |
Maxwell Demon Bottle, PIRA#
Location:
Cabinet: [:MechanicsCabinet:Mechanic (ME)]
Bay: [:MechanicsCabinetBayA2:(A2)]
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.
Equipment |
Location |
ID Number |
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apparatus |
ME, Bay B1, Shelf #2 |
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all other parts |
ME, Bay B1, Shelf #2 |
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... |
ME, Bay B1, Shelf #2 |
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Possible supplies that are needed |
Rode and Tack Cabinet |
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... |
In Lecture Halls |
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... |
Stock Cabinet |
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... |
Stock Cabinet |
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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
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 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.
The "demonability" resides in the fact that the black spheres are constructed so as to rapidly lose momentum (see diagram).
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References:
- List any references
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