2) A hot plate with base temperature of T = 200C has N=16 pin fins made of copper material (k=385 W/mK). The dimensions and geometry of the base plate and pin fins are shown in the figure. Temperature and convective heat transfer coefficient of the surrounding fluid is given as T=24C and h=30 W/mK. Neglecting the contact surface resistance and assuming steady-state one-dimensional heat transfer, determine: a) The fin efficiency (nr), (20 pts) b) The rate of heat transfer from the fins (q), (20 pts) c) The total rate of heat transfer from the fins and the base (unfinned) surface (qt). (10 pts) 3 cm Tooth 0.6 cm 0.25 cm Figure 2. Pinned Fin Array Geometry and Dimensions (Question 2) O 10.6.cm