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The yield strength for an alloy that has an average grain diameter of 5.4 x 10-2...

The yield strength for an alloy that has an average grain diameter of 5.4 x 10-2 mm is 125 MPa. At a grain diameter of 7.7 x 10-3 mm, the yield strength increases to 261 MPa. At what grain diameter, in mm, will the yield strength be 239 MPa?


answer in mm

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