Self-tutoring about metals: the tutor mentions bronze and brass. Bronze is an alloy of copper and tin, while brass is an alloy of copper and zinc. Both are used in industry. Bronze tends to be harder than brass. While they’re …
Self-tutoring about gold and silver: the tutor looks at the long-term relationship between the price of silver and that of gold. (Silver price)/(gold price) has ranged from around 1/15 to around 1/115 over the last 100 years. In the price …
Self-tutoring about gold mining: the tutor was surprised to learn the top three producing countries so far. The leading producers of gold have been China Australia South Africa Interesting, eh? Source: usgs.gov
Self-tutoring about metals, specifically bronze: the tutor looks up some details about copper and tin. Bronze is mainly copper and tin. Yet, what are the relative values of copper and tin? Currently, copper is about $7.59/kg, while tin is about …
Self-tutoring about metals: the tutor looks at brass. Apparently, red brass is around 88% copper, then 8 to 10% zinc, and 2 to 4% tin. On the other hand, yellow brass is 60 to 70% copper, the rest zinc, with …