The circuit in Figure P28.43 has been connected for a long time. (a) What is the potential difference across the capacitor? (b) If the battery is disconnected from the circuit, over what time interval does the capacitor discharge to one-tenth its initial voltage? 1.00 Ω 8.00 Ω + 1.00 uF" 10.0 V 4.00 Ω' 2.00 Ω Figure P28.43