Uploaded January 2018 | Updated September 2026, 2 weeks ago
demonstrations.wolfram.com/PackingOfRhombicDodecahedraExpandingAndContractingInTwoDirec
The Wolfram Demonstrations Project contains thousands of free interactive visualizations, with new entries added daily.
A group of rhombic dodecahedra are hinged at their vertices to form an expanding and contracting structure.
Contributed by: Sandor Kabai
Audio created with WolframTones:
tones.wolfram.com
demonstrations.wolfram.com/PackingOfRhombicDodecahedraExpandingAndContractingInTwoDirec
The Wolfram Demonstrations Project contains thousands of free interactive visualizations, with new entries added daily.
A group of rhombic dodecahedra are hinged at their vertices to form an expanding and contracting structure.
Contributed by: Sandor Kabai
Audio created with WolframTones:
tones.wolfram.com



![Heat Transport and Chemical Reaction in Tubular Reactor with Laminar Flow
http://demonstrations.wolfram.com/HeatTransportAndChemicalReactionInTubularReactorWithLaminarF
The Wolfram Demonstrations Project contains thousands of free interactive visualizations, with new entries added daily.
This Demonstration shows the temperature and concentration profiles of an insulated tubular reactor in which a first-order, irreversible reaction AOverscriptBox[?, k]B takes place in a fluid undergoing laminar flow. Assuming that temperature does not af...
Contributed by: Clay Gruesbeck
Audio created with WolframTones:
http://tones.wolfram.com Heat Transport and Chemical Reaction in Tubular Reactor with Laminar Flow](https://i.ytimg.com/vi/HxGpM94imrM/mqdefault.jpg)




![Constructing a Regular Heptadecagon (17-gon) with Ruler and Compass
http://demonstrations.wolfram.com/ConstructingARegularHeptadecagon17GonWithRulerAndCompass
The Wolfram Demonstrations Project contains thousands of free interactive visualizations, with new entries added daily.
The number 17 is a Fermat prime, which means it is of the form 2^2^n+1, with n=2. In 1796, Gauss discovered that regular polygons with a Fermat number of sides can be constructed using only a straight edge and compass [1]. Gauss showed, in particular, t...
Contributed by: S. M. Blinder
Audio created with WolframTones:
http://tones.wolfram.com Constructing a Regular Heptadecagon (17-gon) with Ruler and Compass](https://i.ytimg.com/vi/IedSSGXCmlg/mqdefault.jpg)

