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At t = 0 seconds, a proton is at a distance of 0.4 m from a...

At t = 0 seconds, a proton is at a distance of 0.4 m from a very large charged insulating plate. Initially, the proton moves parallel to the plate with a speed of 800 m / s. The insulating plate has a charge density of 3.4 x 10^-9 C / m^2. At what distance in m from the plate is the proton after 12 x 10^-6 seconds of travel? Note: the proton charge is 1.6 x 10^-19 C and its mass is 1,674 x 10^-27 kg.
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