The brass wire has a triangular cross section, 2 mm on a side. If the yield stress for brass is t_Y= 205 MPa, determine the maximum torque T to which it can be subjected so that the wire will not yield. If this torque is applied to the 4-m-long segment, determine the greatest angle of twist of one end of the wire relative to the other end that will not cause permanent damage to the wire. G_br= 37 GPa.

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T T