Quote:
Originally Posted by xelasnave
When one invikes the inverse square rule one finds on that basis gravitational influence is not all we expect it to be...we have established in this thread that a black hole has very little influence on its host gallaxy ... what gravitational influenece exists between us and m31 for example.... attraction does not seem to cut it but an over all pressure as I suggest via the flow of paricles all over offers an "external" influence which on large scales may not be subject to an inverse square rule.
alex
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Alex, how about throwing in some math to justify those feelings about inverse square law (or something else) etc?
In our previous discussion I challenged you (and other "pushers") to provide some derivations or links to something more substantial and there were no satisfactory answers..
So I believe it is time to abandon those ideas.
I mean, science works like this: if you can not prove the idea by calculation (that means - theory), or the observational evidence shows that something else is happening (data inconsistent with that theory) then it is time to abandon the sinking ship..
Also, on large scale, and when the matter is distributed in space more or less evenly, overall gravitation effect (force) of course does not follow inverse square law.
Actually it does, it is a mathematical idealisation and it works ONLY between two point-like masses. That means, if radii of those two masses are infinitely smaller than the distance between them then you will have inverse square law, describing the force between them.
In cases of distributed masses - like galactic cluster.. or interior of Earth, to take something more closer for example, we have to use calculus to describe net gravity force. That means, integration of infinite number of individual forces between individual (small) mass concentrations.. and in some cases it is not easy or even impossible to completely solve those equations.
There is no place for feelings here, because those relationships are much more complicated and no "hunch" can help you : unless you have a solid mathematical skills and experience with them.
So, back to school
