Question

solve these physics questions from electrostatics

Answer 1

molecular weight = 63.55

so mass of 1 mole of cu is =63.55

 in 63.55 g number of cu atom   = 6.022 X 1023 

 in 10 g number of cu atom   = 10*6.022/63.55  X 1023 =1.00 X 10 23

  number of electron tranfered  = 10 23   / 106

                                             =1017

so charged genereted in one ball is q  =1.6 X 10-19  X 1017

                                                   =1.6 X 10-2 C

so force F = 1/4∏ε qq/r2

              =9 X 109 * (1.6 X 10-2 )2 / 10-4

              =2.304 1010 N