particle density: 1.05g/cm^3
particle diameter: 10 micrometer
water density: 1g/cm^3
viscosity of water is 1 centipoise
using a laboratory centrifuge to collect particles in a water-filled test tube. what is the time for particles to travel from the top to the bottom of the 10 cm long test tube. The centrifuge is rotating at 500 rpm and the top of the test tube is 5cm from the axis of rotation. You can assume the terminal velocity can be reached instantaneously and the test tube rotates horizontally.
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