An air conditioner with a resistance of 50.0 Omega(R1) and a computer with a resistance of 20.0(R) are connected in parallel to a 120.0-V source through a 2.00-0 resistor (R3) series, as shown below. Find the current through the computer when the air conditioner is on and when is off

An observer that stands still as the electron moves by him, will observe

Ametal ball with a mass of 0.028 kg is dropped from rest at a height of 1.0 meters above the ground. assuming the energy in the ball is conserved, how much kinetic energy will the ball have when it is 0.5 meters above the ground?

Electric field of the earth. the earth has a net electric charge that causes a field at points near its surface equal to 150 n> c and directed in toward the center of the earth. (a) what magnitude and sign of charge would a 60-kg human have to acquire to overcome his or her weight by the force exerted by the earth’s electric field? (b) what would be the force of repulsion between two people each with the charge calculated in part (a) and separated by a distance of 100 m? is use of the earth’s electric field a feasible means of flight? why or why not?