The top surface of a heated compartment consists of very smooth (a) and highly roughened (b) portions, and the surface is placed in an atmospheric airstream. in the interest of minimizing total convection heat transfer from the surface, which orientation, (1) or (2), is preferred? if ts = 100℃, t[infinity] = 20℃, and u[infinity] = 20 m/s, what is the convection heat transfer from the entire surface for this orientation? 7.34

as we probably am aware that our atmosphere or air have various levels, each level has different gasses, and each gas has another porousness. at the point when the light originates from lower porousness to higher penetrability, it alters its course. with the goal that implies that when the light originates from the moon to the earth, it alters it's course a lot more occasions. it essentially implies that the state of the light piece of the moon is changed on the earth.

not copied too! hope this !

joke:

h o h o hope you have a merry christmas!