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A parallel-plate capacitor is made by placing polyethylene ( =2.3) between two sheets of aluminum foil. The area of eachsheet of aluminum foil is 410 cm2, and the thickness ofthe polyethylene is 0.5 mm. The permittivity of free space is8.85 × 10−12 C2/N · m2. Find thecapacitance. Answer in units of nF.

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