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Homework Help: At What temperature will air get a larger kinematic viscosity than crude oil?

  1. Jun 7, 2012 #1
    1. The problem statement, all variables and given/known data

    At What temperature will air get a larger kinematic viscosity than crude oil?
    Please explain step by step.
    I believe we have compare the viscosity of air and the oil using the formula: kinematic viscosity = dynamic viscosity / density

    2. Relevant equations
    inematic viscosity = dynamic viscosity / density
    density = pressure / RT


    3. The attempt at a solution
    so what I did so far was make the kine viscosity (of air) = kine viscosity (of oil)

    dynamic viscosity / (pressure / RT) = dynamic viscosity / (pressure / RT)
    NOW I AM STUCK!!! I do not know what values to use for dyn viscosity, pressure, R. I know I have to solve for T to get the answer.
    (the answer is greater than 7 but no clue how to reach there w/o those values)
     
    Last edited: Jun 7, 2012
  2. jcsd
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