A ball starts from rest and accelerates at 0.470 m/s2 while moving down an inclined plane 8.90 m long. When it reaches the bottom, the ball rolls up another plane, where, after moving 15.20 m, it comes to rest. (a) What is the speed of the ball at the bottom of the first plane? m/s (b) How long does it take to roll down the first plane? s (c) What is the magnitude of the acceleration along the second plane? m/s2 (d) What is the ball's speed 8.30 m along the second plane? m/s

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*