A voltage is applied across two parallel plates spaced 2 cm apart. There is a vacuum and an electric field of density 
in the space between the plates. The intermediate space is filled with some ions 
and 
. How long does it take each of the ions to reach one of the plates if they are initially in the middle of the distance between the plates? For the mass of the sodium ion, take the mass of a sodium atom, which is approximately 
. The same applies to the mass of the chlorine ion, which is 
The base charge is 
. Ignore gravity.
.
.
