Quote:
In classic physics constant have a physical meaning
Take the equation of the gas, for example
pv = kt
K depends on the type of gas
As I said earlier, I have no knowledge of string theory, but I know that pv=kt is more of a chemistry law than a physics law, but that is a trivial point.
However the only gases this law would describe would be 'ideal gases'. I don't think k depends on a type of gas per se, rather it is used in conjunction with a proportionality constant in the ideal gas law used for the wrangling of the equation So I think you might be using a bad equation to state your point, because this equation itself evolves into the IDEAL GAS LAW PV=nRT. These gases only behave this way at certain conditions, .. ideal conditions which really don't exist. Scientists (like fastlane69) would build new constants and numbers in equations to model real life and varying conditions. 
of course, k is going to be a different value depending upon the gas used, but that value isn't going to be constant at all, and it will only come close to constancy under certain ideal conditions, the closer you get to zero pressure.
So I guess my point is that the 18 physical constants may or may not have a real 'physical meaning', I have never studied physics at school so I dont know. However, constants do not always have a physical meaning, as they can be produced for the balance of proportionality, and they can be based on ideals. Such as the ideal gas law, which is simply a recombination of Boyle's Law.
Last edited by TriNitroToluene; 10/19/07 22:34.
