Can you guys please answer this four conceptual questions I have been struggling to understand on the etext

Conceptual Questions 1. a. Charge ql is distance r from a positive point charge Q. Charge q; = (11/3 is distance 2r from Q. What is the ratio U1/U2 of their potential energies due to their interactions with Q? b. Charge ql is distance x from the negative plate of a parallel-plate capacitor. Charge (12 = (11/3 is distance 2x from the negative plate. What is the ratio U1/U2 of their potential energies? 2. Figure Q22.2|E' shows the potential energy of a proton (q = +e) and a lead nucleus (q = +82e). The horizontal scale is in units of femtometers, where 1 fm = 1015 m. a. A proton is red toward a lead nucleus from very far away. How much initial kinetic energy does the proton need to reach a turning point 10 fm from the nucleus? Explain. b. How much kinetic energy does the proton of part a have when it is 20 fm from the nucleus and moving toward it, before the collision? 6. A positively charged dust particle passes between the two oppositely charged plates of an electrostatic precipitator. There is an electric force directed toward the negative plate, but the drag force causes the particle to drift at a constant speed. What energy transformation takes place during this motion? 7. A capacitor with plates separated by distance d is charged to a potential difference AVC. All wires and batteries are disconnected, then the two plates are pulled apart (with insulated handles) to a new separation of distance 2d. a. Does the capacitor charge Q change as the separation increases? If so, by what factor? If not, why not? b. Does the electric eld strength E change as the separation increases? If so, by what factor? If not, why not? c. Does the potential difference AVC change as the separation increases? If so, by what factor? If not, why not