Wolfram Demonstrations Projecthttp://demonstrations.wolfram.com/An Open Resource of Interactive Mathematica VisualizationsCopyright 2009 Wolfram Demonstrations Project & ContributorsMilk Centrifugation to Cream and Skimhttp://demonstrations.wolfram.com/MilkCentrifugationToCreamAndSkim/]]>http://demonstrations.wolfram.com/MilkCentrifugationToCreamAndSkim/Two-Step Equationshttp://demonstrations.wolfram.com/TwoStepEquations/]]>http://demonstrations.wolfram.com/TwoStepEquations/