Two infinite, uniformly charged flat surfaces are mutually perpendicular. One of the sheets carries a charge density of 60.0pc/m2 and the other carries a charge density of -80.0pC/m2 . What is the magnitude of the electric field at any point not on either surface

Auniform electric field exists in the region between two oppositely charged plane parallel plates separated by a distance of 1.60 cm . a proton is released from rest at the surface of the positively charged plate and strikes the surface of the opposite plate in a time interval of 3.20×10-6 s. 1-find the magnitude of the electric field. use 1.60×10-19c for the magnitude of the charge on an electron and 1.67×10-27kg for the mass of a proton 2-find the speed of the proton when it strikes the negatively charged plate