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General Science / Re: Musings on Newton
« on: 14/02/2022 22:03:40 »How can it be in a field-free region when "all the mass in the universe" is around it?How can a region of spacetime be flat, when it has mass, the mass in the universe, all around it? According to Mach's principle, all of spacetime is curved. So the question is as I just asked: how can we determine if a bucket of water, spinning in space, is 'climbing' the sides because of the inertia of liquids, or because there's a universe filled with mass around it?
Also, you should change the title of this thread to be in the form of a question.
Say you're an observer on the rim, the universe is rotating around you, take it from there.