1. The problem statement, all variables and given/known data Find the electric field due to a half circle of radius R and total charge Q. (a) First estimate by dividing the charge into five equal parts. (b) Repeat for 9 equal parts, (c) Using integral calculus solve exactly. 2. Relevant equations E = kQ/r^2 3. The attempt at a solution Cant remember too much from doing these before...for a start I guess... a) break into 5 parts.... Q = Q/5 Just need some help getting going! Thanks in advance!