Which benefit resulted when the Chinese adapted the *cupola furnace* specifically for improved cast iron production?

💡 Explanation

Reduced silica contamination within molten iron led to cast iron’s increased mechanical strength at scale; silica reacts with coke, forming slag that introduces defects; therefore lower silica improved quality, rather than increased oxygen absorption that causes weakness.

• When the Inca Empire collapsed, which primary record-keeping error propagation became widespread?
• Which optical distortion was minimized during the peak era of astrolabe construction?
• Which constraint necessitates azolla's role in early Vietnamese rice cultivation?
• Which mechanism causes systematic declination errors when sighting celestial objects with a corroded brass astrolabe?
• During the age of sail, which limitation increased the risk of catastrophic hull failure during heavy storms?
• Which outcome occurs when tesserae debond from a mosaic?