The ink drops have a mass mm $=1\mathrm{.}001011$ kgkg each and leave the nozzle and travel horizontally toward the paper at velocity vv $=25\mathrm{.}0$ m$/$sm$/$s $.$ The drops pass through a charging unit that gives each drop a positive charge qq by causing it to lose some electrons. The drops then pass between parallel deflecting plates of length D$0$D$0=1\mathrm{.}65$ cmcm $,$ where there is a uniform vertical electric field with magnitude EE $=7\mathrm{.}85104$ N$/$CN$/$C