1. The problem statement, all variables and given/known data The word document with the problem is attached below. 2. Relevant equations dE=kdQ/r22 Ex=Ecos∅ 3. The attempt at a solution dE=kdQ/r2 E=kλ∫dy/(x2+y2) (integrating from y= -L/2 to L/2) Ex=2kλ∫xdy/(x2+y2)3/2 (change integration to y= 0 to L/2, multiplying expression by 2) Let y=xtan∅ dy=x(sec∅)2 d∅ =2kxλ∫x(sec∅)2/x3(sec∅)3 d∅ =2kλ/x∫cos∅ d∅ =2kλ/x(sin∅) =2kλ/x(sin(arctan(y/x)) (evaluated from y=0 to y=L/2) =2kλ/x(y/(x2+y2)1/2 (evaluated from 0->L/2) =2kλ/x(L/2)(x2+(L2)/4)1/2 =((1.8X10^10)λL/(2x))*(1/x2+(L2)/4)1/2 This isn't the correct answer, though I don't know what actually is. I would appreciate any help or guidance!