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The metal part is in fact partially liquid and partially solid depending on how deep in you are. The increasing pressure makes the liquid go to solid state. It
by ArnoVW 7y ago
The metal part is in fact partially liquid and partially solid depending on how deep in you are. The increasing pressure makes the liquid go to solid state.
It is the rotation of this solid part inside of the liquid part that generates magnetic field
- samstave 7y agoWhat keeps it rotating?
- thaumasiotes 7y agoInertia, presumably? What keeps the rest of the Earth rotating?
- onlyrealcuzzo 7y agoHow does pressure affect melting points? I thought the core was like ~6000 C and the melting point of iron is like ~1538 C. My brain is seg-faulting trying to figure out why pressure would make something need to be hotter to melt. I know melted things generally take more space than solid things (except ice, right?). But why does that have to be? Doesn't pressure affect volume already?
- kevin_thibedeau 7y agohttps://en.m.wikipedia.org/wiki/Phase_diagram https://en.m.wikipedia.org/wiki/Phase_diagram
- ArnoVW 7y agoThis YouTube video explains a bit more, and also 'how we know all this': https://youtu.be/muWrmfXpivY https://youtu.be/muWrmfXpivY It is in French (sorry) but it is subtitled and his channel has many very clear explanations about a diverse range of STEM subjects.