$5\mathrm{.}5$ Evaluate the dimensionless groups $\frac{?}{\text{b}\text{a}\text{r}}(h{)}_c\frac{D}{k},U_{}D\frac{}{},$

and $c_p\frac{}{k}$ for water, $n-$butyl alcohol, mercury, hydro$-$

gen, air, and saturated steam at a temperature of $100C.$

Let $D=1m,U_{}=1\frac{m}{sec},$ and vec$(h{)}_c=1\frac{W}{m^2}K.$