Avoltmeter is used to determine the voltage across a parallel plate capacitor; the positive plate has a 400 kv higher electric potential than the negative plate.
1) in ev, how much will the potential energy of a proton change by moving it from near the negative plate to near the posivite plate?
2) in ev, how much will the potential energy of an electron change by moving it from near the negative plate to near the positive plate?

Which statements describe how a machine can make work easier? check all that apply. it can put out more force than the input force by decreasing the distance through which force is applied. it can increase the amount of work performed if the output force is in the same direction as the input force. it can apply a force to an object in a different direction than the force applied to the machine. it can increase the distance through which a force acts by exerting less force than was used on it. it can exert a greater force through a greater distance than the force used on the machine.