You make a capacitor by cutting the 15.5 cm--diameter bottoms out of two aluminum pie plates, separating them by 3.40 mm, and connecting them across a 6.00 V- battery.
Part A: What's the capacitance of your capacitor?
Part B: If you disconnect the battery and separate the plates to a distance of 3.50 cm without discharging them, what will be the potential difference between them?