Two equal charges of 5.1 C are located in the xy-plane, one at (0 m, 48.9 m) and the other at (45.7 m, 0 m). Find the magnitude of the electric field at the origin due to these two charges. The value of the Coulomb constant is 8.98755 109 N m2 /C 2 . Answer in units of N/C.

Find the angle between the vector for the electric field at the origin and a vector in the minus x-direction. Answer in units of .