Please use this identifier to cite or link to this item:
http://bura.brunel.ac.uk/handle/2438/4833
Title: | Determination of the gravitational constant at an effective mass separation of 22 m |
Authors: | Moore, GI Stacey, FD Tuck, GJ Goodwin, B Linthorne, NP Barton, MA Reid, DM Agnew, GD |
Issue Date: | 1988 |
Publisher: | American Physical Society |
Citation: | Physical Review D 38(4): 1023-1029, Aug 1988 |
Abstract: | A vacuum balance that compares the weights of 10-kg stainless-steel masses suspended in evacuated tubes at different levels in a hydroelectric reservoir is being used to measure the gravitational attractions of layers of lake water up to 10 m in depth. The mean effective distance between interacting masses in this experiment is 22 m, making it the largest-scale measurement of G using precisely controlled moving masses. The experiment extends laboratory-type measurements into the range previously explored only by geophysical methods. Assuming purely Newtonian physics the value of the gravitational constant determined from data obtained so far is G=6.689(57)×10-11 m3 kg-1s-2, which agrees with laboratory estimates. The data admit at a 0.6 standard deviation level the parameters of non-Newtonian gravity inferred from geophysical measurements in mines and a tower. These measurements push the estimated ranges of non-Newtonian forces down to a scale accessible to our reservoir experiment, so that experimental improvements now at hand may provide a critical test of non-Newtonian effects. |
Description: | Copyright @ 1988 The American Physical Society |
URI: | http://bura.brunel.ac.uk/handle/2438/4833 |
DOI: | http://dx.doi.org/10.1103/PhysRevD.38.1023 |
ISSN: | 0556-2821 |
Appears in Collections: | Sport Dept of Life Sciences Research Papers |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
Fulltext.pdf | 1.16 MB | Adobe PDF | View/Open |
Items in BURA are protected by copyright, with all rights reserved, unless otherwise indicated.