Physics – Geophysics
Scientific paper
Apr 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982m%26p....26..135y&link_type=abstract
Moon and the Planets, vol 26, Apr. 1982, p. 135-141.
Physics
Geophysics
1
Earth Planetary Structure, Geophysics, Planetary Evolution, Radii, Cosmology, Earth Core, Equations Of State, Expansion
Scientific paper
The equation of state of the terrestrial material obtained from seismic data is adopted to construct three zone earth models under hypothesis of variable constant of gravity G as proposed by Dirac (1974). Three hypotheses are investigated: variable G without creation, creation such that m (mass) varies as the reciprocal of the constant of gravity, and multiplicative creation, where mass varies as the reciprocal of the square of the constant of gravity. It is shown that, with the currently accepted value of the Hubble constant, the radial expansion rates are, respectively, 0.007 cm/yr, 0.019 cm/yr, and 0.025 cm/yr. On the multiplicative creation, the earth radius would have been 5,100 km, which is in agreement with estimate by some geophysicists.
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