Two small spherical balls each carrying a charge `Q= 10 mu C`( 10 micro=coulomb) are suspended by two insulating threads of equal lengths `1 cm` each, from a point fixed in the ceiling. It is found that in equilibrium threads are sepreated by an angle `60^(@)` between them, as shown in figure. What is the tension in the threads
(Given `(1)/(4piepsilon_(0))= 9xx10^(9)Nm//C^(2)` )