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Pressure fluid/ buoyancy problem help pls

  1. May 25, 2009 #1
    One end of a light thin string is attached to a cork with density ρC = 0.24 g/cm3. The other end is attached to a rock. When the arrangement is placed in liquid 1 with density ρ1 = 0.80 g/cm3, a fraction f1 = 0.75 of the cork becomes submerged. When the arrangement is placed in liquid 2 with density ρ2 = 0.89 g/cm3, a fraction f2 = 0.67 of the cork becomes submerged. What is the density of the rock?


    Please derive a equation to solve this problem
     
  2. jcsd
  3. May 25, 2009 #2

    tiny-tim

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    Welcome to PF!

    Hi xgoodtimesx! Welcome to PF! :wink:

    Show us what you've tried, and where you're stuck, and then we'll know how to help! :smile:
     
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