A homemade capacitor is assembled with placing two 9 in pie pans 8 cm apart and connecting them to the opposite terminals of a 9 V battery.
1. Estimate the capacitance. in pF
2. Estimate the charge on each plate. in pC
3. Estimate the electric field halfway among the plates. in V/m
4. Estimate the work done by the battery to charge the plates. in J