Consider the use of rectangular, straight, stainless steel (k=15) fins on a plane wall whose temperature is 100C. The adjoining fluid is at 20C, and the associated convection coefficient is The fin is 6mm thick and 20mm long. (a) Calculate the fin efficiency, effectiveness, and heat rate per unit length. (b) Compare the foregoing results with those for a fin fabricated from pure copper ( k= 400)