Carbon is allowed to diffuse through a steel plate 12 mm thick. the concentrations of carbon at the two faces are 0.86 and 0.40 kg c/m3 in fe, which are maintained constant. if the preexponential and activation energy are 6.2 × 10-7 m2/s and 80,000 j/mol, respectively, compute the temperature (in k) at which the diffusion flux is 6.3 × 10-10 kg/m2-s.

The material that keeps its new shape after it is stretched is called?

Two students, each riding bicycles, start from the same apartment building and ride to the same building on campus, but each takes a different route. the first student rides 1100 m due east and then turns due north and travels another 1430 m before arriving at the destination. the second student heads due north for 1930 m and then turns and heads directly toward the destination. at the turning point, how far is the second student from the destination?

Why is rain likely when warm, moisture-laden air meets cold air? a) the lighter warm air will rise and cool down, causing condensation and rain. b) the cold air moves faster and pushes the warm air away, causing condensation and rain. c) the moisture in the warm air condenses on contact with the cold air, causing rain to fall. d) the cold air mixes with the warm air, reducing its temperature causing moisture to condense.