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## Homework Statement

(a) Copper has a breaking stress of about 3.00×108 N/m2. What is the maximum load that can be hung from a copper wire of diameter 0.37 mm?

(b) If 17 percent of this maximum load is hung from the copper wire, by what fraction of its original length will it stretch?

## Homework Equations

## The Attempt at a Solution

I know that this one is simple, I just can't find the correct formula to use. Anyone got any ideas?