Please write the solution and answer clearly and must put the proper units. thank you.

1. Two charges are located along the x-axis. One has a charge of 6.4 JC and the second has a charge of - 3.2 JC. If the electric potential energy associated with the pair of charges is -4.1 x10-2 J, what is the distance between the charges? 2. A 4.00 HF capacitor is connected to a 12.0 V battery. a. What is the charge on each plate of the capacitor? b. If the same capacitor is connected to a 1.50 V battery how much electrical potential energy is stored? 3. A parallel-plate capacitor has a charge of 6.0 JC when charged by a potential difference of 1.25 V. a. Find its capacitance b. How much electrical potential energy is stored when this capacitor is connected to a 1.50 V battery? 4. If the current in a wire of a CD player is 5.00 mA, how long would it take for a 2.00 C of charge to pass a point in the wire? 5. A total charge of 9.0 mC passes through a cross-sectional area of a nichrome wire in 3.5 seconds. a. What is the current in the wire? b. How many electrons pass though the cross-sectional area in 10.0 s? c. If the number of the charges that pass through the cross-sectional area during the given time interval doubles, what is the resulting current? 6. Find the current in the following devices when they are connected across a potential difference of 120 V. a. A hot plate with a resistance of 48 ohms. b. A microwave oven with a resistance of 20 ohms