$!$

Required information

Problem $08\mathrm{.}126-$ DEPENDENT MULTI$-$PART PROBLEM ASSIGN ALL PARTS

In the effort to find the best way to cool a smooth thin$-$walled copper tube, an engineer decided to flow air either through the tube or across the outer tube surface. The tube has a diameter of $13$ cm $,$ and the surface temperature is maintained constant.

Problem $08\mathrm{.}126.$a $-$ Convection heat transfer coefficient of air in thin copper tube

Determine the convection heat transfer coefficient when air is flowing through a thinwalled tube at $25\frac{m}{s}$ with bulk mean temperature of $50C.$

$\frac{W}{m^2}.$ K