a 100v dc battery, a resistor and a capacitor are connected in series. The capacitor is initially uncharged. The RC time constant for the circuit is .668 second. The charge on the capacitor is observed to be 1.37 *10^-2 C at .400 second after the switch is closed.
1. what is the capacitance of the capacitor?
2. what is the current through the resistor at 1.0 s after the switch is closed.?