Amap suggests that atlanta is d1 = 729 mi in a direction of θ1 = 5.11° north of east from dallas. the same map shows that chicago is d2 = 562 miles in a direction of θ2 = 21.1° west of north from atlanta. modeling the earth as flat, use this information to find the displacement from dallas to chicago.

Asteel tube (k=50 w/mk) of inner and outer diameter di = 20mm and do=26mm, respectively, is used to transfer heat from hot gases flowing over the tube (h-hot = 200w/m2k) to cold water flowing through the tube (h-cold = 8000 w/m2k). what is the cold-side overall heat transfer coefficient uc? to enhance heat transfer 16 straight fins of rectangular profile are installed longitudinally along the outer surface of the tube. the fins are equally spaced around the circumference of the tube, each having a thickness of 2mm and a length of 15mm. what is the corresponding overall heat transfer coefficient uc? *solve for uc in both cases*