Which statement describes an example of static electricity? O A. A person rubs a shoe on a rug, causing extra electrons to be
transferred to the shoe.
O B. Electric charges move from a position of higher potential energy
to a position of lower potential energy.
O C. Electrons flow from an outlet into a toaster, causing it to heat a
slice of bread.
O D. A conductor allows electrons to flow through it.

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