What determines the type of the image formed after refraction from a convex lens? a. size of the lens b. size of the object c. position of the object d. type of the light source

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