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Planet earth is millions and millions of years old. Why does it take so long for earth to cool down?
The Sandia theoretical work showed that phase boundaries for “metallic water” — water with its electrons able to migrate like a metal’s — should be lowered from 7,000 to 4,000 kelvin and from 250 to 100 gigapascal. The core of the earth is at 5600k and about 330-360 gigapascal
Why does it take so long for earth to cool down?
At radius 0 there can be no gravitational effect...the heaviest elements should end up ... somewhere between the upper core and lower mantle area
the Earth's relatively large moon... is like a mixmaster rotating through the layer some 1,700 Kms under the surface.
However, I think that the impact on Earth's interior today might be a little overstated.