The resistivity of seawater is about [tex]0.25[/tex] ohm-meter. The charge carriers are chiefly [tex]\mathrm{Na}^{+}[/tex]and [tex]\mathrm{Cl}^{-}[/tex]ions, and of each there are about [tex]3 \times 10^{26} \mathrm{per} \mathrm{m}^3[/tex]. If we fill a 2 meter long plastic tube with seawater and connect a 12 volt battery to the electrodes at each end, a) what is the resulting average drift speed and direction of the each species of ion? b) What is the electrical current, flowing through this pipe?
