6. A Copper And Steel Wires Are Welded Together At
6. A copper and steel wires are welded together at their ends. The original length of each is 50 cm and each has a diameter of 0.78 mm. A mass of 10 kg is suspended from the coined wire. By how much will the coination stretch? Y coppor= 110 GPa, Y.tool = 210 GPa.