Which constraint limited the rate of fire for repeating crossbows in the Han dynasty?

💡 Explanation

Cast iron embrittlement limited the trigger and magazine mechanism, because high-carbon cast iron parts fractured under stress from repeated firing; therefore the mechanism size had to be large and material thickness substantial, rather than using lighter, stronger wrought iron parts.

• Which consequence results when seams fail on clinker-built longships?
• During the Han Dynasty, which vulnerability arose when improving efficiency in cast iron salt production?
• Which mechanism allowed Alhazen (Ibn al-Haytham) to improve the accuracy of stellar altitude measurements with his dioptra?
• Within the 11th-century Book of Optics, which phenomenon results from Ibn al-Haytham's geometric analysis of conic sections?
• Which outcome occurred when early bronze casters unintentionally introduced arsenic?
• On older marine chronometers, which outcome was amplified because of temperature variation?