The CPI takes a constant basket of goods and sees how the price changes from year to year. If the price of the basket of goods increases, then there is price inflation. If the price of the basket of goods decreases, then there is deflation.
Copper and tin mainly make up bronze but other elements include phosphorus, manganese, silicon and aluminium.
Basically, brass is copper and zinc, while bronze is copper and tin. More metals or metalloids can be added, creating things like silicon bronze, but that is the general distinction-tin or zinc.As you know, zinc corrodes rather quickly in the marine environment, as in sacrificial zinc..asically, brass is copper and zinc, while bronze is copper and tin. More metals or metalloids can be added, creating things like silicon bronze, but that is the general distinction-tin or zinc.