An old electronic vaccum tube was sealed off during manufacture at a pressure of 1.2×10^-7 at 27°c. it volume was 100cm³. How many gas molecule remained in the tube?

Define the terms moral development and moral reasoning

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*

How can a cyclist's acceleration change even if its velocity remains constant?