The first column represents the distances of the center of the elements (the second row is for the third element, the third row for the eighth). The largest percentage change in the results for varying ∆t, from 0.001 to 0.02, at x = 0.975 is 2.4%. For ∆x = 0.1, the last two columns show larger differences in the results for doubling ∆t but they do not exhibit any oscillations. Figure 1 shows the relationship between u and x, where all the data for the hundred elements (∆x = 0.01) are included for the different ∆t values.