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Conservation of angular momentum
Hi Peter & All,
Well, it shouldn't be too hard to work out the total angular momentum as we know the mass of the Earth and its rotational velocity.
Haven't done the maths myself (I'm lazy) but instantly converting virtually all that kinetic energy (an extremely big number) into heat (it's gotta go somewhere) I'd think would probably be enough to completely melt the Earth's crust if not the mantle as well -- which might be uncomfortable if you are a carbon-based life-form.
Best,
Les D
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