[ Physics ] Open Question : Why is interdiffusion controlled by smaller amounts of species? - TheWorldTimesNow

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Wednesday, January 2, 2019

[ Physics ] Open Question : Why is interdiffusion controlled by smaller amounts of species?

Let A and B be diffusing species. The following is relations of interdiffusion coefficient D with their self-diffusion coefficients D_A and D_B and their fractions x_A and x_B D = x_B*D_A + x_A*D_B This means that the interdiffusion coefficient is dominated by smaller amounts of species. What is a physical image of this fact? I feel that the larger amounts of species should dominate. Why is my view not the case?

from Yahoo Answers: Latest Questions https://yhoo.it/2CITkAS

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