Which instability arose with the Tay Rail Bridge (1879) due to unforeseen forces?

💡 Explanation

Resonance caused the Tay Bridge's collapse because wind-induced vibrations amplified natural frequencies compromising stability; therefore, resonance, rather than other factors, yielded catastrophic failure, other mechanisms would result in slower degradation.

• Which risk increases when the chilled-iron compression links in a Stephenson bridge experience prolonged fluctuating stress under heavy rail traffic?
• Which risk inherently increased during the construction of tiered ziggurats?
• Which mechanism increased ziggurat structural instability across time?
• Which initial agricultural effect arises when terraced farming introduces level platforms on slopes?
• Which consequence occurred within a Mesopotamian ziggurat's baked brick structure as alkaline groundwater rose unusually high?
• Which primary outcome arises from increased evaporative cooling within a Mughal garden’s 'charbagh' design?