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MathGroup Archive 2005

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Re: Get numbers out of PhysicalConstants?

  • To: mathgroup at smc.vnet.net
  • Subject: [mg62595] Re: Get numbers out of PhysicalConstants?
  • From: "Chris Chiasson" <chris.chiasson at gmail.com>
  • Date: Tue, 29 Nov 2005 04:44:43 -0500 (EST)
  • References: <dme8l6$inj$1@smc.vnet.net>
  • Sender: owner-wri-mathgroup at wolfram.com

Replace the units with 1s?

ReplaceAll[VacuumPermeability,Rule[Alternatives[Second,Volt,Ampere,Meter],1]]

or

VacuumPermeability/.\[InvisibleSpace]Second|Volt|Ampere|Meter\[Rule]1

By the way, given the definition of VacuumPermittivity, do you think
the magnitude of VacuumPermittivity should be exact like
(1/(VacuumPermeability*SpeedOfLight^2)) or that it should be the
MachinePrecision value it current is?

Full disclosure: I think it should be exact, even though others on the
list seem to disagree.

Regards,
--
http://chrischiasson.com/contact/chris_chiasson


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