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A 4.4-nF parallel plate capacitor with a sheet of Mylar (? = 3.1) filling the space between the plates is charged to a potential difference of 180 V and is then disconnected. (The initial capacitance including the dielectric is 4.4 nF.)

(a) How much work is required to completely remove the sheet of Mylar from the space between the two plates?

(b) What is the potential difference between the plates of the capacitor once the Mylar is completely removed?

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