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Re: [Phys-L] effective teaching of scaling/ratio use


On 2014, Dec 20, , at 10:15, Richard Heckathorn <geepaw@wowway.com> wrote:

Greetings, I have been told that a two-year-old, when an adult, has increased by an approximate scale value of two. If one takes this as a starting point, then all areas increase by two squared or four times, and all volumes and weight increases by two cubed or eight times.

Have a Great Day

Website rheckathorn.weebly.com


This explains why one (who?) has recommended the BMI is inaccurate, because its scale is square instead of cube.

bc has too large a BMI.


Note: The SI BMI is only mass * height^2. (kg*m^2)

p.s. I suggest this formula: mass / height^3 times a factor that results with the ideal weight (mass) being 1 (kg/m^2)

A stats? exercise: Does this formula work for all peoples' ages?