A capacitor with a plate separation of 17 mm is charged up with a battery and then disconnected. Initially, it stored 9.31 J of electric potential energy, but then the plates are moved closer together, to 8.5 mm. How much energy does it store with this decreased plate separation?

a. Sketch the situation, defining all your variables.

b. What physics equation(s) will you utilize in order to solve this problem? For each equation you list, give a justification for why it applies to this situation.

c. Apply your equation(s) to solve the problem as an algebraic expression(s).

d. Calculate your numerical answer(s). Show the units of your answer(s), and how you got them