Problem $5$: $(6$ points$)$

Sunlight hitting a horizontal wall of thickness $L=15cm$ creates a constant and uniform flux going into

the top of the wall on the bottom of the wall, there is contact with air which causes convection. If the

process is steady, what is temperature at the bottom of the wall $(T{s}_2).$

$T_{}=25C$

$h=40\frac{W}{m^2**K}$

$q^{?}==900\frac{}{m^2}$

$k=15\frac{w}{m}*k$

$T_{5_2}=$