> Is it really any weirder than 273.15?
>
> Likewise, I don't think 9.81 is a more convenient constant than 32.2!

Sorry I meant the unnamed numerical constants in equations, rather than the 
official named constants like 'g'.  I was just used to seeing simple 
equations in text books with no numbers in them (just symbols) yet in one of 
my books they use imperial units and almost every equation has some 
numerical constant in it.  On top of that they find it necessary to write 
the units needed for every quantity, which I guess have to tie up with the 
constant.  It just looks messy (and presumably quite hard to remember), 
that's all.

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