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Surface tension mathematical formula.

  1. Dec 17, 2011 #1
    consider a U shaped wire piece. a movable wire is fixed on it and their is liquid bubble in between them. If we move wire through distance l what force we need to apply
    surface tension basic formula is F=Sl. so it should Sl but it is 2Sl i cn't understand can you please help.
  2. jcsd
  3. Dec 17, 2011 #2
    There are 2 surfaces
  4. Dec 17, 2011 #3
    where are two surfaces. there is only one surface of liquid.
  5. Dec 17, 2011 #4
    Your wording sounds to me that there is a film of liquid so there is an upper surface and a lower surface.
  6. Dec 17, 2011 #5
    this was so simple
    very very thanks technician.
  7. Dec 17, 2011 #6
    It is a pleasure.....let's hope that all your problems are as easily sorted out as this one !!!!!!!!!
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