Two parallel plates are charged with 4.98*10^-7 C of charge. What must the area of the plates be to create an electric field of 8720 N/C? (Unit = m^2)​

What is the internal energy of 4.00 mol of diatomic nitrogen gas n2 at 455k

Asmall 12.00g plastic ball is suspended by a string in a uniform, horizontal electric field with a magnitude of 10^3 n/c. if the ball is in equilibrium when the string makes a 30 ° angle with the vertical, what is the net charge on the ball?

Arailroad car collides with and sticks to an identical railroad car that is initially at rest. after the collision, the total kinetic energy of the two cars is a) the same as before. b) half as much as before. c) one third as much as before. d) one fourth as much as before. e) twice as much as before.