Which of the following is a true statement about mass and weight? a. Mass is a measure of how much matter an object has, while weight is a measure of how much space the object takes up. b. Mass will not change based on location, while weight will change based on gravitational pull. c. Mass is a measure of a gravitational pull on an object, while weight is a measure of how much matter is an object has. d. Mass is proportional to the force of gravity, while weight is proportional to the amount of mass.

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*