two -8.1 nC charges, are each separated by 5.0 mm from a proton. If the two negative charges are held fixed at their locations and the proton is given an initial velocity v, what is the minimum initial speed v that the proton needs to totally escape from the negative charges? (k=1/4πε 0 = 8.99 × 109 N · m2/C2 , e = 1.60 × 10-19 C, m proton = 1.67 x 10-27 kg)
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