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Surface tension object targeted

  1. Jul 1, 2014 #1
    To what I know, surface tension is a force that appear at the interface between 2 bulk phases, and is parallel to that interface.

    Let consider a bulk of a fluid in the air. In the bulk of a fluid at rest, two sub-parts of a fluid exert a attractive force on one another due to surface tension.

    What I'm asking is that: Do two sub-parts of the air around exert a force on one another? (surface tension of the air) If they do, is the force equal the force in the fluid? If they don't, why? What if I replace the air by another suitable fluid?
     
  2. jcsd
  3. Jul 1, 2014 #2
    In general the molecules in a gas are too far from each other in order to produce non-negligible forces on each other except during very brief collisions. That's the main difference between a liquid and a gas.
     
  4. Jul 1, 2014 #3
    Ok so what would happen if I put a fluid inside some other fluid?
     
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