A cylindrical rod of copper (E = 110 GPa, 16 x 106 psi) having a yield strength of 240 MPa (35,000 psi) is to be subjected to a load of 6690 N (1504 lbf). If the length of the rod is 380 mm (14.96 in.), what must be the diameter to allow an elongation of 0.52 mm (0.02047 in.)? i mm

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