How much energy is stored in the capacitor in picojoules

How much energy is stored in the capacitor in picojoules

How much energy is stored in the capacitor in picojoules

Physics
A cylindrical capacitor is 0.047 m long and has a cylindrical core with a radius of
0.025 mm and a cylindrical metal sheath with a radius of 0.084 mm. The space
between the core and the sheath is filled with a dielectric with a dielectric
constant of [k]. If a battery provides a potential difference of 12 V to this
capacitor, how much energy is stored in the capacitor in picojoules (pJ)?

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