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Two 3.0 cm-diameter disks face each other, 1.7 mm apart. They are charged to   ±± 17...

Two 3.0 cm-diameter disks face each other, 1.7 mm apart. They are charged to   ±± 17 nC.

Part A: What is the electric field strength between the disks?

Part B: A proton is shot from the negative disk toward the positive disk. What launch speed must the proton have to just barely reach the positive disk?

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