08 Apr '08 14:39>
Originally posted by Bosse de NageThis is a somewhat Kantian issue. Perhaps my less scientific and more philosophical approach will not be of any help to answer your question, but it might help in understanding why it is that we cannot know what gravity 'is'.
I'd like answers to all these questions, really, but I'll take what I can get.
I asked FabianFnas where mass comes from because as far as I can tell the answer is 'gravity' (see Ambrose Bierce quote above).
I was reading about Newton the other day and realized that I'd thought all my life that Newton 'discovered gravity' but in fact he did no suc ...[text shortened]... non fingo indeed.
Well, bring it on, if you please. How does energy do what it does?
Every system is composed of two key components.
1) The set of objects that exist within this system.
2) The set of rules that govern the interactions between them.
The thing is that we are objects within the system. Since our ability to understand these objects is limited by our ability to describe their phenomena, then all knowledge of them must come from observing and identifying patterns in the phenoma.
From identifiable and stable patterns we identify what we call 'rules' or 'laws' that are based on definable, but not identifiable 'forces'. Our component 2). But note that this is purely descriptive. We then characterize the objects by the way they interact with each other and identify what we call properties.
This means that we can never really 'know' (in a standard sense of the word) what these rules 'are' because they are not objects in themselves. At best, we can identify more patterns and improve our understanding of how they work, but not what they 'are'.
To my knowledge, all four forces that we know of suffer from the same issue as gravity:
- strong nuclear force
- weak nuclear force
- gravitational force
- electromagnetic force
Since our knowledge is still incomplete, we still search a 'Unified Field Theory' that may re-identify these 4 basic forces to a single one. But this single one would still suffer from the same issue that it is not an object in itself.