(Answered) Two 2cm disks spaced 20mm apart form a parallel capacitor

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Two 2cm disks spaced 2.0mm apart form a parallel capacitor. The electric field between the disks is 5.0x10^5 v/m. What is V across capacitor? How much charge is on ea disk? An e- is launched from the negative plate at a sped of 2.0x10^7 m/s. What was the e-s speed as it left the negative plate?

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