Which effect arises when firing repeated volleys from identical ancient Chinese crossbows?

💡 Explanation

Decreasing bolt penetration occurs due to spring steel fatigue because repetitive stress applications cause progressive loss of elasticity therefore penetration decreases; rather than other options, which involve wear alone or vibrational coupling—an unlikely scenario due to variances.

• What outcome resulted when cast iron quality declined throughout late-Ming dynasty military foundries?
• What consequence results from inaccurate index mirror adjustment due to thermal expansion aboard an 18th-century sextant?
• Which result manifested when the Anasazi used terraced farming in arid canyons?
• Which consequence results when moisture accumulation behind a 'pietra dura' panel exceeds capillary drainage limits in Mughal architecture?
• Which optical concept enabled the Islamic Golden Age development of precise surgical instruments for cataract removal?
• Which outcome occurred in arsenic bronze metallurgy when tin purity decreased during the early Bronze Age?