$\therefore \alpha = \frac{{k\theta }}{z} \Rightarrow [\alpha ] = \frac{{[M{L^2}{T^{ - 2}}{K^{ - 1}} \times K]}}{{[L]}} = [ML{T^{ - 2}}]$

and $P = \frac{\alpha }{{ \beta }} \Rightarrow [\beta ] = \left[ {\frac{\alpha }{p}} \right] = \frac{{[ML{T^{ - 2}}]}}{{[M{L^{ - 1}}{T^{ - 2}}]}} = [{M^0}{L^2}{T^0}]$.