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Rue McClanahan Cat Party by Sisyphus on February 2nd, 2010, 11:11 pm
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Cosmic Engineering (Quasi-Newtonian Gravity) by BurtJordaan on December 28th, 2014, 2:35 am
In the last installment I attempted to cross the bridge from Special relativity to General relativity by means of things that are accelerated. We will now let gravity do the acceleration and see what it implies in simple situations.

Relativistic gravity is mostly about spacetime geodesics - the shortest path (or rather path of least action) that particles, objects or whatever, take through spacetime. When gravity is present, those paths are curved in most coordinate systems. Pictured below is a two-dimensional cut of a spacetime geodesic () in quasi-Newtonian spacetime.[1]

Image

At the origin sits a large mass M and a small object is released from rest at position . The object is moving upward at a "speed ",...

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Open-mindedness by Sisyphus on October 22nd, 2009, 8:51 pm
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meissner effect possable uses by Anonymous on October 27th, 2012, 9:26 pm
HI I have been kicking around the theory after seeing it on a tv show and think that I might have a engine to build using this. I have been in automotive feild for 20 years need some one that can back the science.
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chemistry by Anonymous on December 7th, 2009, 1:47 am
how can i calculat the ratio of [CrO42-]2 / [Cr2O72-] at neutral pH?
which is the predominating species?
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