Complete the passage to describe the relationships among gravitational force, mass, and distance. The gravitational force between two objects is
✔ directly
related to the product of the masses of the objects, and
✔ inversely
related to the square of the distance between the centers of the objects. Complete the passage to describe the relationships among gravitational force, mass, and distance.

The gravitational force between two objects is
✔ directly
related to the product of the masses of the objects, and
✔ inversely
related to the square of the distance between the centers of the objects.

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*