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Homework Help: Spherical drop of oil question

  1. Nov 18, 2009 #1
    1. The problem statement, all variables and given/known data
    A spherical drop of oil, 1 mm in diameter, falls on a water surface. The oil spreads out to cover a circular patch of diameter 60 cm. The oil spreads out until it forms a uniform layer on top of the water, only one molecule thick. What is the thickness of this layer?

    2. Relevant equations

    3. The attempt at a solution
    I have no idea how they want me to answer this. It states in the question that the layer is 1 molecule thick but I have no idea what type of oil it is so I don't know what thick a molecule of this oil is.
  2. jcsd
  3. Nov 18, 2009 #2


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    Science Advisor
    Homework Helper

    That's what you are trying to find out!
    it's a simple geometry question, the volume of oil doesn't change.
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