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A 0.300-m-long cylindrical capacitor consists of a solid conducting core with a radius of 1.00mm and an outer hollow conducting tube with an inner radius of 2.15mm . The two conductors are separated by air and charged to a potential difference of 6.30V .

A. Find the charge per unit length for the capacitor.

B. Calculate the total charge of the capacitor.

C. Calculate the capacitance.

D. Calculate the energy stored in the capacitor when fully charged.

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