Physics, 25.06.2020 09:01 monsterwins292
What type of image is formed by a lens if m=-0.87?
A. The image is smaller than the object and is real
B. The image is smaller than the object and is virtual
C. The image is larger than the object and is virtual
D. The image is larger than the object and is real
Answers: 2
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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*
Answers: 1
What type of image is formed by a lens if m=-0.87?
A. The image is smaller than the object and is r...
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