Which mechanism determined the lifespan of mechanically driven astronomical clocks developed in the Islamic Golden Age?

💡 Explanation

When an astronomical clock is running, the cyclical stress causes metal fatigue in the escapement mechanism because repeated loading weakens the material and causes cracks, eventually leading to failure. Therefore, material fatigue limits the clock lifespan, rather than thermal expansion, contamination, or gravity which have secondary or minimal impact.

• Which structural weakness arises when a Roman castrum wall's foundational drainage system fails due to silt accumulation?
• Which outcome resulted from cyclical tin depletion in late Bronze Age metallurgy?
• Which visual effect results when monochromatic light passes Medieval Islamic concave lens with microscopic surface imperfections?
• In Aztec chinampa agriculture, which risk increases when intensive year round cultivation depletes soil nutrients?
• Which purpose did the alignment of ancient Egyptian temples like Karnak serve relative winter solstice sunrise?
• Which risk increased in 16th-century fortress design by neglecting algebraic calculation of maximum cannon range?