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QUESTION
a In terms of relative diffusivities, etc., estimate the grain size below which Coble creep dominates diffusional creep and above which...
a In terms of relative diffusivities, etc., estimate the grain size below which Coble creep dominates diffusional creep and above which Nabarro-Herring creep is dominant.
b Determine the temperature above which NH creep dominates Coble creep. Express your answer in terms of the material grain size and the respective Do's and diffusion activation energies.
