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A positive charge +q= +8.0*10^-8 C with mass m=5.5*10^-10 kg, located at the +V plate, is...

A positive charge +q= +8.0*10^-8 C with mass m=5.5*10^-10 kg, located at the +V plate, is at rest. If the final speed of the charge is vf=600m/s when it strikes the -Vplate, what is the electric potential V of the plates? A. 24.9 V B. 1240 V C. 1000 V D. 619 V E. 1.03 V

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