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A common viscous fluid used in physics labs is glycerol, which has a viscosity of 1.412 Pa s. What is
the ratio of the terminal velocity of a 2 μm-diameter silica sphere with a surface charge of 1.5 fC
placed in an electrophoresis cell filled with glycerol to that of one filled with water? The distance
between the electrodes is 1.5 cm and the cell potential is 9V.

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