Please show the steps on how to solve the following:

77. INT . . . An electric field E = (100,000 N/C, right) causes the 5.0 g ball in Figure P21.778 to hang at a 200 angle. What is the charge on the ball? Figure P21.77 1200 5.0 g 13. .. What are the speeds of (a) a proton that is accelerated from rest through a potential difference of -1000 V and (b) an electron that is accelerated from rest through a potential difference of 1000 V?12. it At one point in space, the electric potential energy of a 15 11C charge is 45 ltr]. a. What is the electric potential at this point? I}. If a 25 :1": charge were placed at this point, T.Jl't'tat would its electric potential energj,r be? 23. ' 'i'u'hat is the electric potential at the point indicated with the dot in Figure P2128 IE'E Figure P2 2.23