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Re: A Determination of the Gravitational Constant



Gary Karshner wrote:
Ludwik,
Hasn't that are ready been do with the Etvos experiment to much
greater accuracy - I seem to remember Dicke getting it to be the same to one
part in ten to the 15 or something like that.

Gary

It was the At 08:52 AM 3/10/99 +0100, you wrote:
At this level of accuracy they will probably start investigating the
effect of chemical composition (of the perturbing mass) on G.
Stars are mostly hydrogen; our planet is not.

Gary Karshner

Effects of composition were also a major focus of the so-called "fifth-force"
experiments of a decade ago. After a major flurry of activity inspired by the
reanalysis of Eotvos' data by Ephraim Fischbach(sp?) of Purdue that seemed to
show a composition dependence, no dependence was in fact found.

Tim Sullivan