A sample of blood is placed in a centrifuge of radius 120, Ask an Expert

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A sample of blood is placed in a centrifuge of radius 12.0 cm. The mass of a red blood cell is 3.0 x 10^-16kg, and the magnitude of the force acting on it as it settles out of the plasma is 4.0 x 10^-11N. At how many revolutions per second should the centrifuge be operated?

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