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MathGroup Archive 2005

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Re: Get numbers out of PhysicalConstants?

  • To: mathgroup at smc.vnet.net
  • Subject: [mg62594] Re: Get numbers out of PhysicalConstants?
  • From: bghiggins at ucdavis.edu
  • Date: Tue, 29 Nov 2005 04:44:37 -0500 (EST)
  • References: <dme8l6$inj$1@smc.vnet.net>
  • Sender: owner-wri-mathgroup at wolfram.com

 Try the following:

 << Miscellaneous`PhysicalConstants`

 Times @@ Cases[VacuumPermeability,
    x_?NumericQ :> x]

Cheers,

Brian

Wonseok Shin wrote:
> Hello,
>
> Is there any way to get numbers out of the constants defined in
> Miscellaneous`PhysicalConstants` package?  Carrying units all the time
> is inconvenient in calculation.
>
> For example,
> In[1]:= << Miscellaneous`PhysicalConstants`
> In[2]:= VacuumPermeability
> Out[2]= \!\(\(p\ Second\ Volt\)\/\(2500000\ Ampere\ Meter\)\)
>
> I want to get the number p/2500000 out of VacuumPermeability, without
> units.  How can I do this?


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