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For questions about the universal accelerative force between all objects.
6
votes
Could a planet have a core of anything other than iron?
The problem with having magnetite as the core of an Earth-like planet is the pressure and associated temperature that the core would reach. Magnetite ($\text{Fe}_{3}\text{O}_{4}$) breaks down at very …
1
vote
What effects would moving between areas of different gravity have on a human?
Your eyes also change shape after a long period of time in zero gravity, but will return to normal when exposed to regular gravity within days to a week. … Note that these things really only apply to people who aren't used to zero gravity. If you have experienced operators, they will be able to switch between different gravity areas quickly. …