Question

- Multiple Choice Circle one or more 10. In the transient 1-0 heat conduction solution, will a large h result in a large tempenture variation on - a small temperature variation within solid? (A) a large temperature variation B) a small temperature variation 11. In the transient I-D heat conduction solution, will a large h result in a large or small temperature difference betn the solid surface and surrounding fluid? Al a large temperature difference (B) a small temperature difference in a half and put it into the 12. We out a watermelon freeze to cool it quickly. Under which situation the watermelon is coded faster? (A) a larger h (B) smaller h 13. Under which situation the frostbite (20°c) is more likely to occur in the maximum (in the middle of watermelon piece) temperature within the watermelon is kept lower than 5°C ? e larger h B ) smallerh 14. What is the physical significance of the limiting case of a large Biot number (Biro) or a small Bust number (Bin0.01)? A large Bi number will result in a small ten beth surface & fluid, &large variation within solid (B) A small Bi number will result in a large temp. difference beth syrpace & fluid, & small to the variation within

Answer 1

® 10) 1) 12 13 14) a large temp variation a small temp. difference a larger & smalle h ® Both are correct A, ON