I have attempted two questions, see below.
1. The relationship between energy, E, and momentum, p, is E = P^2C^2 + M^2C^4 for a relativistic particle, Show that the equation is homogeneous
2. The current, I, in a wire is given by I = nAev where n is the number of electrons per unit volume, A is the cross sectional area of the wire, e is the charge on an electron and v is the drift velocity of the electrons. Show that the equation is homogeneous.
3.My attempts in photo.
I am assuming 16 is definitely wrong.
and for the questions, so you can see them more articulately.