Re: beginner question regarding units in equations

*To*: mathgroup at smc.vnet.net*Subject*: [mg123939] Re: beginner question regarding units in equations*From*: Richard Fateman <fateman at cs.berkeley.edu>*Date*: Mon, 2 Jan 2012 02:40:23 -0500 (EST)*Delivered-to*: l-mathgroup@mail-archive0.wolfram.com*References*: <jdh6ag$kka$1@smc.vnet.net>

On 12/28/2011 11:53 PM, RDog wrote: > I am a very new user so I apologize in advance if this question is too > basic for the group. > > Many civil engineering equations are empirically derived and therefore > the units dont work out exactly. How does Mathematica handle units in > equations and especially in empirical equations where there may be > parameters set to weird exponetial powers. Does the program use units > at all in equations or does the user need to keep track? > > I think the answer is simple/ You say you are a beginner. Assume that Mathematica does not handle units. When you are no longer a beginner, you can come back to this issue if you wish. For fun, While you are thinking about units, how is it that automobile efficiency has dimensions of 1/length^2 ? miles per gallon = length / (length^3), right? RJF