Re: Physical Constants package
- To: mathgroup at smc.vnet.net
- Subject: [mg46978] Re: Physical Constants package
- From: "John Jowett" <John.Jowett at cern.ch>
- Date: Thu, 18 Mar 2004 01:25:05 -0500 (EST)
- Organization: CERN
- References: <200403160737.CAA28635@smc.vnet.net> <c3880v$bjq$1@smc.vnet.net> <c38v35$g4m$1@smc.vnet.net>
- Sender: owner-wri-mathgroup at wolfram.com
You need to apply PowerExpand to the expression. If you do this sort of thing a lot, you might be interested in our enhanced version of the standard packages for constants and units. You can download it from http://jowett.home.cern.ch/jowett/Accelerator/ConstantsUnits.html Then your example would be PowerExpand[ToFundamentalSI[ 0.39789711297139907/(Meter^3*(Kilogram/(Joule*Second^2))^(3/2)) ]] which returns 0.397897 John Jowett "Curt Fischer" <crf3 at po.cwru.edu> wrote in message news:c38v35$g4m$1 at smc.vnet.net... > Ed Pegg Jr wrote: > > A package that deals with physical constants has recently been > > added to the Mathsource Infocenter library. > > > > http://library.wolfram.com/infocenter/Conferences/4993/ > > > > For A to C, the constants included are as follows: > > > > accelerationOfGravity, ageOfUniverse, ageOfUniverseInGYear, > > astronomicalUnit, atomicMassConstant, avogadroConstant, > > baryonDensityOfUniverse, bohrMagneton, bohrMagnetonIneV, > > bohrRadius, boltzmannConstant, classicalElectronRadius, > > comptonWavelength, comptonWavelengthReduced, > > conductanceQuantum, constantOfGravitation, conversionConstant, > > conversionConstantSquare, cosmicBackgroundTemperature. > > On a sort-of related note, does anyone know when quantum chemistry units > (energy in Hartrees, distance is Bohrs, etc) will find there way into the > Miscellaneous`Units` package? > > Also, is there any good way to get Mathematica to simplify expressions such > as > 0.39789711297139907/(Meter^3*(Kilogram/(Joule*Second^2))^(3/2))? Plain > inspection shows that the units all cancel out, but the Miscellaneous`Units` > package doesn't do the job. In general, the problem seems to be with units > to some non-integer power. > > > -- > Curt Fischer >
- References:
- q's about NumericQ and saving interpolating function
- From: sean_incali@yahoo.com (sean kim)
- q's about NumericQ and saving interpolating function