Redetermination of the Newtonian gravitational constant G
Abstract
The universal Newtonian gravitational constant is being redetermined at the National Bureau of Standards with use of the method of Boyes (1895) in which the period of a torsion pendulum is altered by the presence of two 10.5kg tungsten balls. The difference in the squares of the frequencies with and without the balls is proportional to G. The resulting value of G is (6.6726 + or  0.0005) x 10 to the 11th cu m/sec kg.
 Publication:

Physical Review Letters
 Pub Date:
 January 1982
 DOI:
 10.1103/PhysRevLett.48.121
 Bibcode:
 1982PhRvL..48..121L
 Keywords:

 Gravitational Constant;
 Harmonic Oscillation;
 Newton Theory;
 Gravitational Fields;
 Standards;
 Torsion;
 Vibration Damping;
 Physics (General);
 06.30.Gv;
 Velocity acceleration and rotation