Example 1.1-1 in BS&L

>  restart;
>  mu:=0.7*cp;
>  dvxdy:=-1000/s;
>  tauyx:=-mu*dvxdy;
From convu: 1.000000 cp = 0.2088553E-04lbf*s/(ft*ft) 
(cp stands for centi-poise)
>  cp:=0.2088553E-04*lbf*s/(ft*ft); 
>  tauyx;

>