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**There are 1000 tonnes of high tensile steel wire stressed to 1000MPa. How much energy is stored in the steel?**

**[itex]\sigma = P/A[/itex]**

**First I multiplied the 1000 tonnes (1000000kg) by 9.8m/s^2. Then I found the volume by dividing the weight by the original weight. I don't know what to do next. I am not even sure if i am going in the right direction or which equation i should use. Any help is appreciated.**