On Tue, 16 Jul 2002, gfgs pedo wrote:
it was an observation of a physical body,then we make a mathametical model of the phenomenon. Based on the mathametical model we make laws of physics.
Right, but the assumptions of the model are stated up front.
The mathametical observations rely on the parameters that are taken to make the mathametical model. if the parameters changes,the mathametical model will have to be changed and new laws have to be brought.
Whoa! You have gone too far here. The original assumptions and the original model still hold, what changes are the assumptions. You get new models, but that doesn't mean the old model doesn't work any more - it means you have to be careful with assumptions.
with what certainy can we say that additional parameters will not be added or removed and that the laws of physics will stay true for ever? If a new parameter ever gets added may be two bodies with mass may repell each other. can we say that these parameters will never change?
We can be certain that we will learn more as time goes on. Our present models work well for the assumptions we make now, and as time goes on we'll learn how those assumptions interfere with observations of how nature works. How we ask questions determines what kinds of answers we get - so it's really important to understand the basic assumptions behind any "law of physics". Patience, persistence, truth, Dr. mike