A centrifuge rotor is spinning at 25.000. The 'top' of the cell is 5.5 cm from the rotor's central axis. and the 'bottom' of the cell is 9.5 cm from the central axis. What are the forces on a particle found at the top and at the bottom of the tube?

Pulmonary Disease Suppose a 60-year-old man who has never smoked cigarettes presents to a physician with symptoms of a chronic cough and occasional breathlessness. The physician becomes concerned and orders the patient admitted to the hospital for a lung biopsy. Suppose the results of the lung biopsy are consistent either with lung cancer or with sarcoidosis, a fairly common, usually nonfatal lung disease. In this case A={ chronic cough, results of lung biopsy } Disease state B1=normalB2=lungcancerB3=sarcoidosis Suppose that Pr(AB1)=.001Pr(AB2)=.9Pr(AB3)=.9 and that in 60-year-old, never-smoking men Pr(B1)=.99Pr(B2)=.001Pr(B3)=.009 The first set of probabilities Pr(ABj) could be obtained from clinical experience with the previous diseases, whereas the latter set of probabilities Pr(B1) would have to be obtained from age-, gender-, and smoking-specific prevalence rates for the diseases in question. The interesting question now becomes what are the probabilities Pr(B,A) of the three disease states given the previous symptoms