Measurement of Eccentricity of the Centre of Mass from the Geometric Centre of a Sphere
GUO Jun-Qi1, HU Zhong-Kun1, GU Bang-Ming2, LUO Jun1,2
1Department of Physics, Huazhong University of Science and Technology, Wuhan 430074
2Institute of Geodesy and Geophysics, Chinese Academy of Sciences, Wuhan 430077
Measurement of Eccentricity of the Centre of Mass from the Geometric Centre of a Sphere
1Department of Physics, Huazhong University of Science and Technology, Wuhan 430074
2Institute of Geodesy and Geophysics, Chinese Academy of Sciences, Wuhan 430077
Abstract： The eccentricity of the centre of mass from the geometric centre of a spherical attracting mass in determining the Newtonian gravitational constant G is tested by means of an electronic balance. The experimental result shows that the eccentricity of the sample is about 0.31 μm with uncertainty of 0.05 μm. Two density distribution models are discussed to estimate the uncertainty to G by the eccentricities of the attracting masses.
GUO Jun-Qi;HU Zhong-Kun;GU Bang-Ming;LUO Jun;. Measurement of Eccentricity of the Centre of Mass from the Geometric Centre of a Sphere[J]. 中国物理快报, 2004, 21(4): 612-615.
GUO Jun-Qi, HU Zhong-Kun, GU Bang-Ming, LUO Jun,. Measurement of Eccentricity of the Centre of Mass from the Geometric Centre of a Sphere. Chin. Phys. Lett., 2004, 21(4): 612-615.
2004, Vol. 21 
