How many electrons have been removed or protons added

1) A 0.15 g honeybee acquires a charge of 25 pCwhile flying. The electric field near the surface of the earth is typically 100

A) What is the ratio of the electric force on the bee to the bee's weight?

B) What electric field strength would allow the bee to hang suspended in the air?

2) A) A glass rod is charged to + 4.0 nC by rubbing. Have electrons been removed from the rod or protons added? Explain.

B) How many electrons have been removed or protons added?

3) A small metal sphere has a mass of 0.13 g and a charge of -25.0 nC . It is 10 cm directly above an identical sphere with the same charge. This lower sphere is fixed and cannot move.

A) What is the magnitude of the force between the spheres?

B) If the upper sphere is released, it will begin to fall. What is the magnitude of its initial acceleration?