I kept getting the wrong answer for this one, work and answer will be appreciated. (14.9 or 15.9 ms are wrong)

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I kept getting the wrong answer for this one, work and answer will be appreciated. (14.9 or 15.9 ms are wrong)

[From: ] [author: ] [Date: 12-05-15] [Hit: ]

The discharge equation is Q(t) = Q(0) e^-(t/RC) with Q(t) = 7.00 uC and Q(0) = 20.......

A 30.0 uF capacitor initially charged to 20.0 uC is discharged through a 2.30 kilo-ohm resistor. How long does it take to reduce the capacitor's charge to 7.00 uC?

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72.4 ms

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No trouble at all.

The discharge equation is Q(t) = Q(0) e^-(t/RC) with Q(t) = 7.00 uC and Q(0) = 20.0 uC

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