Created by StemPy LabWhy are steel girders often made with an I-shaped cross-section?
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← The sag of a loaded beam goes as 1/bd³, where b is its breadth and d its depth. A beam is replaced by one of the same breadth but twice the depth. The new sag isThe rock at the base of a mountain flows if its stress passes about 3.0 × 10⁸ Pa. If the rock has a density of 3000 kg/m³, roughly how tall can a mountain be? (g = 9.8 m/s².) →
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