Example 8.1-1 Changing Units

>  restart;
>  A:=1*ft^2; Y:=0.252*inch; Q:=3*watt; dT:=2*K; Given data
>  k:=Q*Y/(A*dT);  Eq 8.1-1
>  watt:=J/s; ft:=12*inch; inch:=2.54*cm; J:=.23901*cal;  
Converting units.
>  k;  The text found 2.47e-4 cal/(s*cm*K)