[填空题]
Two small nonconducti( h4:ok)g 2fk hwjnsu6 hhw7l*ng spherm8s9ud4u;7se9kq a s(7 p + qh3dlusvves have a total charge of $90.0\,\mu C\,.$
(a) When placed 1.06 m apart, the force each exerts on the other is 12.0 N and is repulsive. What is the charge on each? $ \times10^{ -6}\,C$$\;\;\;\;$ $ \times10^{ -6}\,C$
(b) What if the force were attractive? $ \times10^{ -6}\,C$$\;\;\;\;$ $ \times10^{ -6}\,C$
