The RC circuit of Fig. 19-57 (same as Fig. 19-21a) has R = 6.7 k and C

The RC circuit of Fig. 19-57 (same as Fig. 19-21a) has R = 6.7 kΩ and C = 3.0μF. The capacitor is at voltage V0 at t = 0, when the switch is closed. How long does it take the capacitor to discharge to 1.0% of its initial voltage?

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VoC ER