You want to know the size of charge that a small ball acquires by being touched with a charged object. You tie two identical balls to the two ends of a very light string (one ball to each end of the string) and hang the center of the string over a nail sticking out of the wall. The two balls are originally neutral and they both hang straight down from the nail, touching eachother. Then you charge an insulating rod by rubbing it with your shirt and then touch the balls with it. The balls move apart. You measure the angle that each half of the string creates with the vertical to be 0.800 and separation between the balls of 1.1 cm. Before hanging the balls you have determined that each is 2.00 grams.Now you calculate the charge on each ball (assuming equal charge on each).

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