Key Example Variation Problem $24\mathrm{.}9$ Be sure to review Examples $24\mathrm{.}5$ and $24\mathrm{.}6($Section $24\mathrm{.}2)$ and Examples $24\mathrm{.}7,24\mathrm{.}8,$ and $24\mathrm{.}9($Section $24\mathrm{.}3)$ before attempting these problems. VP $24\mathrm{.}9\mathrm{.}4$ Part N The plates of a parallel$-$plate capacitor in vacuum are $1\mathrm{.}40$ mmmm apart and $2\mathrm{.}45$ m$2$m$2$ in area. The charge on the capacitor is $1\mathrm{.}15105$C$1\mathrm{.}15105$C$.$ Part O Calculate the surface charge density on the positive plate. Part P Find the electric energy density between the plate.

Express your answer with the appropriate units. Part Q Calculate the total energy stored in the field between the plates.

Express your answer with the appropriate units.

Express your answer in coulombs per meter squared. Calculate the electric field magnitude between the plates.

Express your answer with the appropriate units.