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A capacitor is charged to a potential of 11.5 V and is then connected to a...

A capacitor is charged to a potential of 11.5 V and is then connected to a voltmeter having an internal resistance of 3.50 MΩ. After a time of 3.50 s the voltmeter reads 3.0 V.

(a) What is the capacitance?
_____ F

(b) What is the time constant of the circuit?
______ s

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