When polarizing an object, what happens to the charges in the object?
a. they swirl about like bees in a hive.
b. they separate, with positive charges on one side and negative
charges on the other.
c. the protons drain off, leaving the object negatively charged.
d. they repel each other and spread out all around the outer surface.

An athlete swings a ball, connected to the end of a chain, in a horizontal circle. the athlete is able to rotate the ball at the rate of 8.13 rev/s when the length of the chain is 0.600 m. when he increases the length to 0.900 m, he is able to rotate the ball only 6.04 rev/s. (a) which rate of rotation gives the greater speed for the ball? 6.04 rev/s 8.13 rev/s (b) what is the centripetal acceleration of the ball at 8.13 rev/s? m/s2 (c) what is the centripetal acceleration at 6.04 rev/s? m/s2