Apositive point charge q is located at x=a and a negative point charge −q is at x=−a. a positive charge q can be placed anywhere on the y-axis. find an expression for (fnet)x, the x-component of the net force on q. (give your answer in terms of q, q, a, y and constant k.)

Aprotein molecule in an electrophoresis gel has a negative charge. the exact charge depends on the ph of the solution, but 30 excess electrons is typical. what is the magnitude of the electric force on a protein with this charge in a 1600n/c electric field? write in two significant numbers, and also in newton