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but these nuts move by gravity do they not? and what in the universe is exactly up and down? and why would that matter? are all celestial bodies then a local u
by sim7c00 1y ago
but these nuts move by gravity do they not? and what in the universe is exactly up and down? and why would that matter?
are all celestial bodies then a local up and 'away from them' down?
this analogy hurts my brain. please tell me how to make the hurting stop
- jvanderbot 1y agoYou need to reread the middle only. It's a kind of "vacuum" effect.
- sim7c00 1y agobut where in nature is then this vacuum? is it just higher and lower energy density or something? like high and low pressure systems in weather pushing and pulling? that would or might imply gravity is electromagnetic? (sorry if this seems really off the charts / missing your point!)
- franktankbank 1y agoNo you are right. You can't invoke gravity in an analogy trying to explain gravity.
- cwmoore 1y agoNot without a bridge for the metaphor to generalize. What parameters map to the nutjar’s selective force, size, and mass?
- dudeinjapan 1y agoThe same effect could be replicated in a zero-gravity environment using an alternative background force (centrifugal force, vacuum suction, electromagnetism, etc.)
- BenjiWiebe 1y agoWouldn't that mean that if gravity was like this analogy, that gravity would still need an external background force to work? And how would you explain the presence of that force?
- nitwit005 1y agoThis problem of explaining gravity with gravity is a bit pervasive, and it frustrated the heck out of me as a kid.