Re: [Phys-l] New gravitational constant

[Jack Uretsky <jlu@hep.anl.gov>]

Hi Savinainen-
	1.5 sd is not usually considered a significant difference.
						Regards,
							Jack


On Tue, 22 Jan 2008, Savinainen Antti wrote:

> Hi,
>
> have you noticed that the value of the gravitational constant has changed? The
> new value given by CODATA is:
>
> (6.67428 +/- 0.00067) * 10^(-11) m^3kg^(-1)s^(-2)
> <http://physics.nist.gov/cgi-bin/cuu/Value?bg|search_for=gravitational+constant>
>
> whereas the older accepted value was:
>
> (6.67259 +/- 0.001) * 10^(-11) m^3kg^(-1)s^(-2)
>
> I knew that this constant is very hard to measure accurately but it surprised
> me that the discrepance between the new and old value is so great that they do
> not agree within their uncertainty limits.
>
> Regards,
>
> Antti Savinainen
> Kuopion Lyseon lukio
> Finland

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