Path: utzoo!utgpu!news-server.csri.toronto.edu!rutgers!usc!samsung!umich!umeecs!kamidon
From: kamidon@zip.eecs.umich.edu (Keith Amidon)
Newsgroups: comp.sys.handhelds
Subject: Re: Units problem....
Summary: An addition to my earlier comments...
Message-ID: <1990Dec16.225234.6000@zip.eecs.umich.edu>
Date: 16 Dec 90 22:52:34 GMT
References: <1990Dec16.220615.5132@zip.eecs.umich.edu>
Organization: University of Michigan EECS Dept.
Lines: 33

In regard to my previous post on unit conversion problems on the hp48sx:

I investigated this a little further, and what is happening is that:

   UBASE:    1_V    =    1_kg*m^2/(A*s^3)
             1_C    =    1_A*s
             1_F    =    1_A^2*s^4/(kg*m^2)
           1_C/F    =    1_kg*m^2/(A*s^3)

The above are all correct.  However, here is where things start getting
weird:

          
   UBASE:  1_C^.5   =    1_A*s             <-- 1_C^.5 == 1_C  ?!?!?!
           1_F^.5   =    1_A*s^2/(kg*m)    <-- why no SQROOT() for kg?
           1_V^.5   =    1_kg*m/(A*s^2)    <-- why no SQROOT() for kg?
                                               why no SQROOT() for A?
                                               why (s^3)^.5 == s^2 ?

It is possible to have an SI base to the.5 power as verified by:

          SQROOT(1_kg*m^2/(A*s^3)) == 1_kg^.5*m/(A^.5*s^1.5) 

This takes the SQROOT of UBASE(1_V) and gets the right answer.  I am totally
clueless as to why the calculator would behave in the way it is.  Does
anyone else know?

           Again, thanks for the help......

                                                 Keith

kamido@zip.eecs.umich.edu
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