https://www.sciencedirect.com/science/article/abs/pii/S036013230700025X What did they find? Did they find that mechanical conditioning was better than natural conditioning? i need i explain please about conclusion

A structural member 10 cm long must be able to support a load of 50,000 N without experiencing any plastic deformation. Given the following data for brass, steel, aluminum, and titanium, rank them from least to greatest weight in accordance with these criteria. Yield strength Ultimate tensile Alloy Density (g/cm3) (MPa) strength (MPa) Brass 415 600 8.5 Steel 860 800 7.9 Aluminum 310 435 2.7 * 700 Titanium 550 4.5

Changes in cortical bone density and bone geometry occur with aging in both men and women (Table 1 from Russo 2003). These changes manifest as decreased bone strength, which has the clinical impact of increasing the risk of fracture with increasing age. However, elderly men are much less prone to fracture than elderly women. It has been suggested that age-related bone loss is the consequence of endosteal bone resorption resulting in changes in bone geometry (~2mm less cortical bone thickness in women as they age) and contributing to relative differences in fracture risk between men and women. Cortical bone area decreases in women between the ages of 20 and 85, whereas there is no significant change in cortical bone area for men over the same age range (Table 1). Table 1: Changes in bone density and cortical bone area - from Italian population of 612 men and 693 women Age group (years) ANOVA 20-39 Total bone density 4% (mg/cm³) Men Women Cortical bone area 38% (mm²) Men 318.9±47.9 Women…

Can someone please help me to correctly solve all the following parts of this question. Thank you!