(a) A physics lab instructor is working on a new demonstration. She attaches two identical copper...

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(a) A physics lab instructor is working on a new demonstration. She attaches two identical copper globes with mass m = 0.190 g to strings of length L as shown in the figure. L A m m Both globes have the same charge of 6.40 nC, and are in static equilibrium when m = 5.40°. What is L (in m)? Assume the strings are massless. (b) What If? The charge on both globes is increased until each string makes an angle of 0 = 10.8° with the vertical. If both globes have the same electric charge, what is the charge (in nC) on each globe in this case? nC (a) A physics lab instructor is working on a new demonstration. She attaches two identical copper globes with mass m = 0.190 g to strings of length L as shown in the figure. L A m m Both globes have the same charge of 6.40 nC, and are in static equilibrium when m = 5.40°. What is L (in m)? Assume the strings are massless. (b) What If? The charge on both globes is increased until each string makes an angle of 0 = 10.8° with the vertical. If both globes have the same electric charge, what is the charge (in nC) on each globe in this case? nC

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