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MathGroup Archive 2005

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Re: Get numbers out of PhysicalConstants?

  • To: mathgroup at smc.vnet.net
  • Subject: [mg62615] Re: [mg62572] Get numbers out of PhysicalConstants?
  • From: <bsyehuda at gmail.com>
  • Date: Tue, 29 Nov 2005 04:46:22 -0500 (EST)
  • References: <200511280638.BAA19174@smc.vnet.net>
  • Sender: owner-wri-mathgroup at wolfram.com

Replace the units with 1 that is
VacuumPermeability /. Thread[Rule[{Ampere, Volt, Meter, Second}, 1]] or
VacuumPermeability /. {Ampere->1,Volt->1,Meter->1,Second->1}

yehuda

On 11/28/05, Wonseok Shin <wssaca at gmail.com> 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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