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Males on average are 15% heavier and 15 cm (6 in) taller than females. [274] [275] On average, men have about 40–50% more upper-body strength and 20–30% more lower-body strength than women at the same weight, due to higher amounts of muscle and larger muscle fibers. [276] Women generally have a higher body fat percentage than men. [277]
The National Institute of Standards and Technology formerly contended that customary area units are defined in terms of the square survey foot, not the square international foot, [17] but from 2023 it states that "although historically defined using the U.S. survey foot, the statute mile can be defined using either definition of the foot, as is ...
7.874 g/cm 3 [3] when liquid ... Medieval blast furnaces were about 10 feet (3.0 m) ... [174] A table of the old and new adult daily values is provided at Reference ...
To observe the fundamental stretching absorption spectrum of water or of an aqueous solution in the region around 3,500 cm −1 (2.85 μm) [90] a path length of about 25 μm is needed. Also, the cuvette must be both transparent around 3500 cm −1 and insoluble in water; calcium fluoride is one material that is in common use for the cuvette ...
The formula for the surface area of a sphere is more difficult to derive: because a sphere has nonzero Gaussian curvature, it cannot be flattened out. The formula for the surface area of a sphere was first obtained by Archimedes in his work On the Sphere and Cylinder. The formula is: [6] A = 4πr 2 (sphere), where r is the radius of the sphere.