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A proton accelerates from rest in a uniform electric field of 640 N/C. At some later time, its speed is 1.2 x 106 m/s. How long does it take the proton to reach this spee
d?
O a. 3.1x 104s
O b. 8.2 x 10-4 s
OC.1.95 x 10-5 s
O d. 1.6 x 10-5 s

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