A test charge of +5e is brought into an electric field of strength of 5.0 X 10^-5 N/C at a distance from the source of 10 cm what is the electrostatic force on the test charge? (Coulomb's constant is 9.0 X 10^9 Nm^2/C^2; e= -1.602 X 10^-19 C)

An electron has a charge of -2.0*10^-6 C inside a sphere with a radius of 0.5m. Calculate the electric field.

Electrostatic force (in Newtons)between two charges is given by the formula, Fe=kq1 q2/r^2, where k is about 9E9. The amount of charge in a AA battery is about 9000 coulomb. Suppose you took two AA batteries and dumped one of the battery's charge in the purple pile and the other battery's charge in the red pile. You place the piles 9 meters apart. What is the electrostatic force between the two charges? (You should be able to do this math in your head) Select: (1E6 N, 7.29E17 N, 8.1E16 N, or 9E15 N) Is this a repulsive or attractive force? Select: (neither, repulsive, or attractive)To increase the magnitude of this force, would you increase or decrease the distance between them? Select: (increase, decrease, or depends on direction)

1) An object is found to have -3.6 x10-6 C of charge on it. How many electrons we added (positive answer) or removed (negative answer) from the object?   2) A charge of -0.7x10-6C is placed at x = 0m. A second charge of 2x10-6C is placed at x = 0.22m. What is the electric field (size and direction) at x=0.050m?