Two parallel conducting plates are connected to a constant voltage source. The magnitude of the electric field between the plates is 2899 N/C. If the voltage is doubled and the distance between the plates is reduced to 1 6 the original distance, what is the magnitude of the new electric field

Two identical stars with mass m orbit around their center of mass. each orbit is circular and has radius r, so that the two stars are always on opposite sides of the circle. (a) find the gravitational force of one star on the other. (b) find the orbital speed of each star and the period of the orbit. (c) how much energy would be required to separate the two stars to infinity?