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[" 19.Four point charges "+8 mu C,-1 mu ...

[" 19.Four point charges "+8 mu C,-1 mu C,-1 mu C" and "],[" fixed at the points "-sqrt(27/2)m,-sqrt(3/2)m+g_(1/2)],[+sqrt(27/2)m" respectively on the "y" -axis.A particle "2],[6times10^(-4)kg" and charge "+0.1 mu C" moves along the "x" -dires,"],[" Its speed at "x=+oo" is "v_(0)" .Find the least value of "v_(0)f_(0)" th "],[" the particle will cross the origin.Find also the kinetic "],[" of the particle at the origin.Assume that space is gravityg "],[(1/4 pi varepsilon_(0)=9times10^(9)Nm^(2)/C^(2)).]

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