1. (a) Explain how pure copper is made.
(b) What are some of the important properties of copper?
(c) What is brass?
(d) What is bronze?
(e) Why does the Statue of Liberty appear green?
2. We say that copper can contain up to 40% Zn or 9% Al and still be single phase. How do we explain this statement in view of the phase diagrams for the Cu-Zn system? [See Figure 14-6(a).]