A $23\mathrm{.}0$ FF capacitor is charged by a $140\mathrm{.}0-$VV power supply, then disconnected from the power and connected in series with a $0\mathrm{.}260-$mHmH inductor.

Part A

Calculate the oscillation frequency of the circuit.

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HzHz

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Part B

Calculate the energy stored in the capacitor at time tt$=0$msms $($the moment of connection with the inductor$).$