$k=237\frac{W}{m}*K,T_b=70C$

$h=15\frac{W}{m^2}*K,T_{}=20C$

$t=2mm(fin$ thickness$)W=5mm(fin$ width$)$

$d=5mm(space$ between fins $in$ both directions$)L=20mm(fin$ length$)$

Determine:

The heat transfer per fin. $($Assume fins are rectangular in shape with smooth surfaces.$)$

The heat transfer from the base area between fins.

The fin efficiency.

The fin effectiveness.

The total heat transfer from the heat sink.