Please show how you answer the following questions, the answers are at the bottom of the page, thanks!

Electric Potential/ Work On point charges 1. What is the potential difference between the poles of a 9 volt battery? 2. The potential at a distance of 25 cm from a point charge is - 6.4 x 104 V a) What is the sign and magnitude of the point charge ? b) What would the potential be at a distance of 50 cm on the same charge? 3. Calculate the potential 0.50 m from a 4.5 x 10-4 C point charge 4. How much work must be done to increase the potential of a 2.5x 10-7 C charge by 100 V ? 5. A 1.0 x 10-6 C charge is 40 cm from a 3.2 x 10-3C charged sphere. How much work is required to move it there from a point 100 cm away from the sphere? 6. How much energy is acquired by an electron moving through a potential difference of 2.5 x 104 V 7. It takes 4.2 J of work to move 1.2 x 106 C of charge from point X to point Y in an electric field. What is the potential difference between X and Y. 8. What potential difference would accelerate a helium nucleus ( q = +2e ) from rest to a kinetic energy of 1.9 x 10 -15 J. 9. An electron with an initial speed of 1000 m/s is shot at a second electron held stationary at 1.0 x 10 -5 m away. a) How close to the stationary charge does the moving charge get? b) Describe the motion of the moving charge after it reaches minimum separation 1 V = 9V 2, a) -1,8 x 10-C b) -3.2 x 104 V 3.8.1 x 10' V 4. 2.5 x 10-5J 5. 43 J 6. 4.0 x 10 -15 J 7. 3500 kV 8. 5937.5 V 9 a)0.34 mm b) acc in opp dir