1. The problem statement, all variables and given/known data A charge lies on a string that is stretched along an x axis from x = 0 to x = 3.00 m; the charge density on the string is a uniform 9.00 nC/m. Determine the magnitude of the electric field at x = 8.00 m on the x axis. 2. Relevant equations [itex] \int_0^3 kλ/(8-x)^2\,dx [/itex] 3. The attempt at a solution k=8.99e9 λ=9 I know k and λ can come out of the integral leaving 1/(8-x^2). which gives me 9.44e-10 which webassign marks wrong.