Man's size in terms of fundamental constants

Details Man's size in terms of fundamental constants Man's size in terms of fundamental constants

Aug 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980amjph..48..597p&link_type=abstract

American Journal of Physics, Volume 48, Issue 8, pp. 597-598 (1980).

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Metrology, Other Topics Of General Interest

Scientific paper

Why are we the size we are, instead of some very different size? Simple physical scaling laws and three ''requirements'' dictate that our size be of order (ℏ2/mee2)(e2/Gmp 2)1/4. They also ''predict'' the mass and radius of the Earth. The three requirements are: (i) We are made of complicated molecules; (ii) we breathe an evolved planetary atmosphere; (iii) we are about as big as we can be without breaking.

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