Two large parallel non-conducting sheets are spaced d = 2.80 cm apart and have a potential difference of magnitude 500 V. An electron is thrown directly away from one sheet, and is stopped just before reaching the other sheet.
a.) What is the initial speed given to the electron?
b.) What is the strength of the electric field between the plates?
c.) If you are told the plates have equal but opposite charge density, what must be its magnitude?