Posted by **Please Help!!!** on Sunday, March 16, 2014 at 3:18pm.

no matter how i work it out, i keep getting the wrong answers. please help!!! i only have two more submissions before it closes on me.

A sample of blood is placed in a centrifuge of radius 14.0 cm. The mass of a red blood cell is 3.0 x 10^-16 kg, and the magnitude of the force acting on it as it settles out of the plasma is 4.0 x 10^-11 N. At how many revolutions per second should the centrifuge be operated?

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