1. Not finding help here? Sign up for a free 30min tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Centrifuge problem

  1. Dec 14, 2005 #1
    I have a problem with a small physics problem. It requires some knowledge of calculus which I dont yet posses Im looking here for ideas. The problem states that there is a centrifuge tube with a lenght 12cm that is caused to spin by a rotating arm with lengt 8 cm. The tube is filled with 10 cm of a homogenous liquid with density p. It is rotating at a full angular velocity w and its travelling fast enough to be almost horizontal.

    The question requires me to show that the resultant pressure of the liquied at a distance r from the axis of rotation is delta p/ delta r= prw^2

    any suggetions on how to get this result?
  2. jcsd
  3. Dec 14, 2005 #2

    Doc Al

    User Avatar

    Staff: Mentor

    Start by writing the net force on a small slice (thickness delta r) of the liquid. Use Newton's 2nd law to find that force. The acceleration is centripetal.
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?

Similar Discussions: Centrifuge problem