12 , (II) Each of two identical Styrofoam balls has a charge Q and a mass m = 2 g. They are suspended by threads
12 , (II) Each of two identical Styrofoam balls has a charge Q and a mass m = 2 g. They are suspended by threads of length L = 1 m, as shown in Fig. 22.23. Because of the mutual repulsion of the balls, the threads are at a 150 angle to the vertical. Find Q. L m m FIGURE 22.23 Exercise 12
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