Hedgehog model


Pressure is omnipresent. His work can be represented by a hedgehog.

Educational phase: fixation


Required aids+

  • hedgehog
  • inflator
  • 2 beakers
  • food coloring
  • water


Experiment instructions+



The fluid pressure acts, and it tries to cope. Thus begins the spring hedgehog.

Experiment video+

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Physical interpretation+

Pascal's law tells us that: "The pressure caused by external force acting on the liquid surface is everywhere the same fluid." When the piston compression pressure acting on the fluid that carries liquid up to the holes in the hedgehog, where there is a blast.
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This experiment has been added 11.11.2011 by and since then have 8165 visits.
3.6.2014 21:44 © Krejčí Jan