Which risk increased during Inca wall construction at Sacsayhuamán involving imperfect ashlar stones?

💡 Explanation

Seismic vulnerability increases because the interlocking unmortared stones rely on shape for stability, therefore seismic waves can cause relative motion between stones leading to collapse, rather than the material creep seen in more homogenous materials.

• Which mechanical action describes the primary contribution of torsion springs in a Roman ballista?
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• Which positional error arises when a sextant's mirrors misalign slightly?
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