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Chaotic motion on water surface

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Uploaded by on Mar 2, 2008

A third demonstration of the Marangoni effect. Here, small shapes are cut out of cardboard and placed on the surface of water. A volatile organic liquid is added to the water. After some time, you observe the cardboard pieces moving chaotically on the water surface. This effect is again due to surface tension gradients that arise once the organic liquid begins to evaporate.

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Science & Technology

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Standard YouTube License

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  • "They're....comunicating... with us..." 

  • What is the fluid you're adding to the water? If you added soap, would teh surface tension still be enough to support them? Thanks-good video!

  • What type of liquid would you add to the water to create this effect? Iodine? Thanks!

  • cool

  • hehehe, it's always good to see the reality of our teories (brownian motion). I was expecting much smaller forces :O

  • good

  • Teacher Bertran was love very much this video...

    Wake up girl!!! (rs)

  • Teacher Bertran was love very much this video...

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