Context: The major applications of copper are in electrical wires (60%), roofing and plumbing (20%) and industrial machinery (15%). Copper is mostly used as a pure metal, but when a higher hardness is required it is combined with other elements to make an alloy (5% of total use) such as brass and bronze. A small part of copper supply is used in production of compounds for nutritional supplements and fungicides in agriculture. Machining of copper is possible, although it is usually necessary to use an alloy for intricate parts to get good machinability characteristics.

Question: What percentage of copper is used in electrical wires?
Answer: 60%

Question: What percentage of copper is used in roofing and plumbing?
Answer: 20%

Question: What percentage of copper is used in industrial machinery?
Answer: 15%

Question: What property does combining copper with brass or bronze create?
Answer: hardness

Question: What is a metal that copper is combined with to create a greater hardness?
Answer: brass

Question: What percentage of copper is used in paper wires?
Answer: Unanswerable

Question: What percentage of copper is forbidden in roofing and plumbing?
Answer: Unanswerable

Question: What percentage of copper is destroyed by industrial machinery?
Answer: Unanswerable

Question: What property does combining copper with brass or bronze eliminate?
Answer: Unanswerable

Question: What is a plant that copper is combined with to create a smoother texture?
Answer: Unanswerable