A chemical reactor used for a polymerization reaction is stirred with constant power. At low viscosity $(1$ N$$s$/$m$2)$ is the number of rotations is $25$ min$-1.$ However, with time the viscosity increases, resulting in a reduction of the rotational speed $($because of constant power$).$ The power $($P$)$ needed for stirring is a Chapter $2$Dimensional AnalysisThis chapter deals with different situations in which the Buckingham theorem can be applied in order to determine the scale of the parameters involved and study their relationships$02$ Dimensional Analysis

function of rotational speed $($N$),$ the viscosity of the medium $(\backslash$mu $)$ and the diameter of the stirring device $($distance between the blades$).$ A$)$What is the viscosity of the fluid if the final $($steady$-$state$)$ rotational speed has become $1$ min$-1?($Ans$.=625$ kg$/$m$.$s$)$