Physics Studying Electric fields and Coulomb's law.

16. (II) A large electroscope is made with "leaves" that are 78-cm-long wires with tiny 21-g spheres at the ends. When charged, nearly all the charge resides on the spheres. If the wires each make a 260 angle with the vertical (Fig. 16-55), what total charge Q must have been applied to the electroscope? Ignore the mass of the wires. 2601 260 78 cm 78 cm FIGURE 16-55 Problem 16