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Homework Help: Angular velocity

  1. Nov 26, 2011 #1
    A centrifuge is used to increase the sedimentation rate of
    particles suspended in a liquid, over the rate produced
    by gravity alone. Find the angular velocity of a centri -
    fuge in which a particle 10.0 cm from the axis of rotation
    experiences a radial acceleration of 1.00* 10^3
    times gravitational acceleration g.

    Solution: radius (r) = 0.01 m ; ar = 1.00*10^3*9.80

    1.00*10^3*9.80 = (.01)w^2

    w = ( 1.00*10^3*9.80/.01)^(1/2) = 989

    Answer is 313 rad/sec....

    where did I go wrong>?
  2. jcsd
  3. Nov 27, 2011 #2
    10.0 cm = 0.1 m

    Do not underestimate the girth of the centimeter.
  4. Nov 27, 2011 #3
    thank you,
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