Consider two concentric conducting spherical shells of negligible thickness separated by vacuum. One of the shells has a radius of 1 m, while the other has radius of 8 m. The total charge of one of the inner shell is 4 uC, while that of the outer is 8 uC. Their respective total charges are distributed evenly on their surfaces. Determine the total potential energy, in millijoules, stored between the two shells. Use the permittivity of free space as 8.854 × 10-12 F/m.

Consider two concentric conducting spherical shells of negligible thickness separated by vacuum. One of the shells has a radius of 1 m, while the other has radius of 8 m. The total charge of one of the inner shell is 4 uC, while that of the outer is 8 uC. Their respective total charges are distributed evenly on their surfaces. Determine the total potential energy, in millijoules, stored between the two shells. Use the permittivity of free space as 8.854 × 10-12 F/m.