An object is placed on the left side of a concave spherical mirror. The mirror reflects light from the object to form a real image. Which statement describes the path of the light rays?

Light rays converge on the left side of the mirror.

Light rays converge on the right side of the mirror.

Light rays appear to diverge from positions on the left side of the mirror.

Light rays appear to diverge from positions on the right side of the mirror

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*