Constants in the HP35S  Printable Version + HP Forums (https://archived.hpcalc.org/museumforum) + Forum: HP Museum Forums (https://archived.hpcalc.org/museumforum/forum1.html) + Forum: Old HP Forum Archives (https://archived.hpcalc.org/museumforum/forum2.html) + Thread: Constants in the HP35S (/thread128279.html) 
Constants in the HP35S  JF Garnier  11112007 I noticed that the physics constants in the HP35S are slightly different from my other "reference" machines.
HP35S reference machines
The biggest relative difference is found for the constant of gravitation. As G is not known very well, it seems that it's now a rounded value. I don't know for the HP50. Was it updated with new constant values too? JF
Edited: 11 Nov 2007, 11:35 a.m.
Re: Constants in the HP35S  James M. Prange (Michigan)  11112007 Quote:No, it uses the same ROM, equation libraries, and periodic table library as the 49g+. For that matter, with a few simple tricks, this ROM (although without the Saturn+ speedup tweaks) can be used on the 49G as well.
The equation and periodic table libraries are ports of the libraries on the
G: 6.67259E11_m^3/(s^2*kg) G: 3.32208E11_lbf*ft^2/lb^2
Does anyone know whether any "constants" have been "officially" revised from
By the way, if you're using ROM revision 2.012, then I recommend upgrading to
Regards, Re: Constants in the HP35S  Ken Shaw  11122007 According to NIST (least sig. digits uncertainty in parentheses) G is 6.67428 (67) k is 1.3806504 (24)
R is 8.314472 (15)
Re: Constants in the HP35S  Dave Shaffer (Arizona)  11122007 If you click a few layers deeper, to codata ref you will see the magic term "CODATA internationally recommended values."
These values are the result of an occasional (every few years) leastsquares adjustment of all the latest experimental determinations of physical constants. The results become the values recommended for all scientific uses. In this case, the latest fit took place in 2006. If you want your HP 48/49/50 results to agree with the rest of the world, you should use the CODATA values. For all you error analysis junkies, note that all constants also have an error estimate. (A few constants, like the speed of light, are given/defined to have an exact value.)
