(2) C2 (foils initially touching): a. Based on your observation, draw the distribution of top and bottom charges for both pieces of aluminum foil when: i. The foils are touching each other and the charged PVC pipe is nearby ii. The foils have been separated and the PVC pipe has been moved away b. Explain the initial and final charge distributions drawn above. 2. (2) C4 (foils not initially touching): a. Based on your observation, draw the distribution of top and bottom charges for both pieces of aluminum foil when: i. The charged PVC pipe is nearby ii. The charged PVC pipe has been moved away b. Explain the initial and final charge distributions drawn above.

The ultracentrifuge is an important tool for separating and analyzing proteins. because of the enormous centripetal accelerations, the centrifuge must be carefully balanced, with each sample matched by a sample of identical mass on the opposite side. any difference in the masses of opposing samples creates a net force on the shaft of the rotor, potentially leading to a catastrophic failure of the apparatus. suppose a scientist makes a slight error in sample preparation and one sample has a mass 10 mg larger than the opposing sample. if the samples are 12 cm from the axis of the rotor and the ultracentrifuge spins at 70,000 rpm, what is the magnitude of the net force on the rotor due to the unbalanced samples? ( be thorough on your answer)