Suppose that z2 is the impedance of the line in the region x > 0, and that the voltage in this region takes the form v(x, t) = vt cosω c (x − c t) . give a physical interpretation of this solution. find the corresponding current, i(x, t). demonstrate that the mean energy flux down the line in the region x > 0 is hi2i = v 2 t 2 z2