5.32 the outer surface of a steel gear is to be hardened by increasing its carbon content; the carbon is to be supplied from an external carbon-rich atmosphere, which is maintained at an elevated temperature. a diffusion heat treatment at 850 (1 123 k) for 10 min increases the carbon concentration to 0.90 wt% at a position 1.0 mm below the surface. estimate the diffusion time required at 650℃ (923 k) to achieve this same concentration also at a 10- mm position. assume that the surface carbon content is the same for both heat treatments, which is maintained constant. use the diffusion data in table 5.2 for c diffusion in a-fe

The difference(s) between the grand canyon and valles marineris is/are: (a) the grand canyon was formed by water, but valles marineris was not. (a) valles marineris is much longer than the grand canyon. (c) valles marineris is much wider than the grand canyon. (d) valles marineris has large volcanoes near it. all of the above

Ineed this answered asap the north korean communist government a. controls crop production and distribution. b. is not involved in crop production and distribution. c. exports its huge rice surplus to other countries. d. allows farmers to choose which crops to grow but controls where the crops are sold. which statement below is true? a. east asian nations are members of nafta. c. industry and production is not an important aspect of east asian economics. b. east asian nations are economically independent. d. the economies of most east asian countries are mixed or market systems. what is the main idea of this passage? a. the city of hiroshima can never fully recover from the atomic bombing of 1945. b. hiroshima is more modernized than any other city in japan. c. after being bombed, hiroshima was rebuilt and became a thriving urban port. d. the city of hiroshima has an extensive park system dedicated to peace.

Which characteristic regarding the americas often stood out the most for many europeans? > > summary 1 2 3 4 5 6 7 8 9 10send a message review: incorrect exit which characteristic regarding the americas often stood out the most for many europeans?