Originally Posted By: paul
Quote:
Treat units like variables


units do not change so they cannot vary thus they cannot be variables.

You already treat numbers like variables, 3 doesn't change but you still square it the same as you'd square x. Come on Paul, why don't you focus on the issue instead of looking for word tricks?

Quote:

meters does not morph into something other than meters.

1m = 100cm
If you deny that then end of thread.
See how 1 is not the same as 100, but with the units included, the two sides of the equation are (undeniably) equal?


Quote:

therefore you can multiply , add , subtract or whatever you want to a unit and it never changes.

That's the basic mistake you can't seem to let go of. If units can't be operated on, why on earth do you think we have things like:

12 ft^2
15 psi (pounds / in^2)
20 ft-lb (20 ft-lb is not the same as 20lb, ask any mechanic)
20 Nm
40 m/s (surely the same as 40m.s or 40m)
etc..

Don't you see that these units aren't just made up because they sound like words, they have a reason.