Question
plz help me solving these 2 questions the second one by
estimation
You and a friend are doing the laundry when you unload the dryer and the discussion comes around to static electricity. Your friend wants to get some idea of the amount of charge that causes static cling. You immediately take two empty soda cans, which each have a mass of 120 grams, from the recycling bin. You tie the cans to the two ends of a string (one to each end) and hang the center of the string over a nail sticking out of the wall. Each can now hangs straight down 30 cm from the nail. You take your flannel shirt from the dryer and touch it to the cans, which are touching each other. The cans move apart until they hang stationary at an angle of 10 degree from the vertical. Assuming that there are equal amounts of charge on each can, you now calculate the amount of charge transferred from your shirt. Conceptualize, Categorize, Analyze, Finalize Q2 (on back of paper): - Let's say you are holding two tennis balls (one in each hand), and let's say these balls each have a charge Q. Estimate the maximum value of Q so that the balls do not repel each other so hard that you cannot hold them in place.
Explanation / Answer
For the first question.........mgsin5 = F
F=kq*q/(2*0.3sin5)^2
q=2.92*10^-6 nano coulomb..
For the second question..........F=kQ*Q/(arms length)^2
F=arms capacity.
