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For each of the following pairs indicate which one will be stronger and provide a brief...

For each of the following pairs indicate which one will be stronger and provide a brief (onesentence) explanation as to why: a) Copper with a grain size of 10 um, or copper with a grain size of 1 um. b) A one-phase alloy of sliver and copper, or pure silver. c) Undeformed aluminum, or aluminum that has been work hardened.

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please dear thumpsup for the answer. Thank you.

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