Re: A Determination of the Gravitational Constant

["E. Leonard Jossem" <Jossem@MPS.OHIO-STATE.EDU>]

The gravitational constant is the LEAST well known of the so-called
universal constants.
For the "accepted" SI value see the URL:
http://physics.nist.gov/cgi-bin/cuu/Category?view=html&category.x=99&category.y=
4
for the National Institute of Science and Technology (formerly the National
Bureau of Standards) web page.



> 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