#  Surface Tension 

 



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### Double Bubble

\[S | t+ | ★★★\]  
Double your pleasure with this puzzler: small bubble blows up large one.

\[[In-Depth Description](/presentations/double-bubble)\]

### Soap Film and String

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A loop of string floating on a soap film is pulled into a perfect circle by surface tension.

### Capillary Action

\[S | t+ | ★★\]  
Array of capillary tubes of different bore diameters.  
  
\[[In-Depth Description](/presentations/capillary-action)\]

### Minimal Surfaces

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Soap films on wire frames.

### Molecular Size

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Molecular size is determined by means of a Langmuir trough.

\[[In-Depth description](/presentations/molecular-size)\]

### Holy Boat

\[M | t | —\]  
An open mesh plastic fruit container easily floats on top of water.

### Water Drops

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Smaller drops are more spherical. Water drops on Teflon are more spherical, but try adding some soap!