Determination of the gravitational constant at an effective interaction distance of 112 m

Details Determination of the gravitational constant at an effective interaction distance of 112 m Determination of the gravitational constant at an effective interaction distance of 112 m

Feb 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994phrvl..72.1152c&link_type=abstract

Physical Review Letters, Volume 72, Issue 8, February 21, 1994, pp.1152-1155

Physics

14

Experimental Tests Of Gravitational Theories

Scientific paper

The Newtonian gravitational constant has been determined at an effective interaction distance of 112 m. A high-precision balance was used to compare the weights of two 1-kg stainless stell masses located above and below the variable water level of a pumped-storage lake. Water-level changes up to 43 m produced a maximum weight difference of 1290 μg, which could be measured with a resolution of <1 μg. The data yield a value for the gravitational constant G of (6.6700+/-0.0054)×10-11 m3 kg-1 s-2 (1σ), in agreement with laboratory determinations. New limits for the strength of possible new intermediate-range forces are placed.

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