Laboratory Instruments

A sample of blood is placed in a centrifuge of radius 19.0 cm. The mass of a red blood cell is 3.0 10-16 kg, and the magnitude of the force acting on it as it settles out of the plasma is 4.0 10-11 N. At how many revolutions per second should the centrifuge be operated?

One Comment zu “Can Anyone Help Me Out With This Physics Question???”

1. Billy K
   1-13-2010 @ 12:23

   F=(4mr pi^2 )/T^2 plug in all the values T= .00750 seconds
   frequency (f)= 1/T which comes out to 133 revs/s

   
   

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