PRACTIC OTHER (a) A physics lab instructor is working on a new demonstration. She attaches two identical copper globes with mass m = 0.210 g to filaments of length L as shown in the figure. L m A Both globes have the same charge of 6.80 nC, and are in static equilibrium when 0 = 4.70. What is L (in m)? Assume the filaments are massless. m (b) What If? The charge on both globes is increased until each filament makes an angle of 0 = 9.40 with the vertical. If both globes have the same electric charge, what is the charge (in nC) on each globe in this case? nc Need Help? Read It