Which outcome followed the Song Dynasty's discovery of coke fueled iron smelting?

💡 Explanation

Coke lessened sulfur contamination in the iron because it became ideal for advanced artillery (cannons that required higher quality powders); therefore gunpowder formulations scaled significantly, rather than sulfur removal increasing or precision improving.

• Which structural failure mode limited the height of Roman defensive walls constructed with opus caementicium?
• Which risk greatly increased during Roman ballista operation near fortress walls facing counter-fire scenarios?
• Which risk to operation arose when Islamic metalworkers thinned astrolabe plates?
• Which consequence arises from index error in a navigational sextant?
• Within Song Dynasty strategic crossbows, which consequence results when poor crucible management contaminates cast iron production?
• Which outcome arose from flaws during the construction of Vasa?