net force upward = adhesive force* - (density of dye) (height of paper towels) (length of paper towels) (width of paper towel) (acceleration of gravity)
*adhesive force is a function of the width of capillary tubes, surface
tension of dye, and molecular properties of paper towels.
white paper towel roll, black liquid dye, white plastic bucket
Wednesday, October 13, 2010
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