posted by Sagal .
The Pith balls may be positive, negative or neutral.
Four pith balls are suspended by insulated threads. The following reaction occurs.
a) #2 pith ball is positively charged
b) #2 attracts all the other pith balls,.
c) #1 and#3 pith balls repel each other.
d) #4 attracts all the other ith balls.
Determine the charge on each pith ball.