Which material's lower availability created a major limit on Roman ballista projectile range versus torsion spring power?

💡 Explanation

When ballista torsion springs were pushed toward higher tension, the limiting factor became obtaining sufficient quantities of high-tensile capability wrought iron due to bloomery steel methods, rather than oak timbers. Therefore tensile steel controlled spring limits, rather than oak, ropes or flint which could be more consistently sourced.

• Which limiting outcome did annual flooding most directly prevent in pre-Columbian chinampa agriculture of the Valley of Mexico?
• Which optical outcome critically limited the accuracy of early astrolabes using pinhole sights?
• Prior to gunpowder, which mechanism enabled Roman siege catapults (ballistae) to achieve significant projectile range?
• Which agricultural risk increased as chinampa farming intensified within the Aztec Triple Alliance?
• Which outcome resulted from the Aztecs constructing chinampas in the Valley of Mexico's lake system?
• Which constraint primarily limited the yield of maize crops grown in Aztec chinampas?