Which outcome results when stone foundations experience differential settling?

💡 Explanation

Arch keystone instability occurs because outward thrust increases due to shifts from differential settling, stressing the joints beyond their capacity by exceeding static friction. This causes the joints to begin separating and the arch subsequently falls, rather than remaining static since the components lose their individual compression support.

• Which risk sharply rose when the early Ming dynasty shifted military tactics to utilize gunpowder siege cannons?
• Which consequence results when ancient siege engines lacked counterweight consistency?
• Which consequence results when medieval astrolabes suffer from improperly polished alidade surfaces?
• Which outcome regularly occurred when early Ming Dynasty crossbow makers enhanced triggers for faster firing rates?
• Which consequence results when a medieval alchemist's lens introduces chromatic aberration into observations?
• Which error increases when astrolabe alidade misaligned beyond manufacturer tolerance?