????????? ???????? ??? ???? ??????? ??????? ?? ????? ???????. ??? ???? ????????? ????????? ???? ? ????? ????????? ????????? ??????? ?? ???? ????? (??????) ??? ? ??? ???? ???? ?? ??? ?????????? ???? ?????????? ????? ???.Cost on the gold-leaf electroscope triggers the leaves to visibly repel each other By modern day convention, the charge carried by