excuse professor but the problem of time persists

eg

default values ??but B = 0

in the latest version of the program:

deltax = 1.35 units, deltatime = 6.784us

if we have 1 = 100um

we have 135um and divided by deltatime you get 20m / s

instead the speed [u][b]that is correct[/b][/u], and set to 200m / s

so the time must be divided by 10 to a correct result
thanks