Status of measurement of the Newtonian gravitational constant G.

Details Status of measurement of the Newtonian gravitational constant G. Status of measurement of the Newtonian gravitational constant G.

Jun 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000cqgra..17.2351j&link_type=abstract

Classical Quantum Gravity, Vol. 17, No. 12, p. 2351 - 2363

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Gravitational Constant: Measurements

Scientific paper

Although the gravitational constant G was the first physical constant to be introduced and measured in the history of science, it is still the least well known. The 1998 CODATA recommended value for G, (6.673±0.010)×10-11 m3kg-1s-2, has an uncertainty of 1500 parts per million (ppm), which is much larger than that of all other fundamental constants. Here, the authors review the status of our knowledge of the absolute value of G, nine experiments for measuring the absolute values of g within the last five years, the experiments in progress and being planned, and the systematic error due to the inelasticity, the nonlinearity and the thermoelasticity of torsion fibers.

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