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In light of the comments above, regarding the time energy relation, I would need to read more about the time energy relation and later rephrase this question. Normally I would delete the question, but it may be of value to other newbies like myself, making the same wrong assumption that the time energy relation is equivalent to the position momentum ...

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It depends. In an isolated system, they live immensely long. However, if (with their powerful gravity) collect enough mass, they will collapse into a black hole. The rate Hawking radiation (black holes radiating energy away) has to do with the mass of black holes. Small blacks will be gone quickly due to Hawking radiation. They, in a brilliant ...

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The pressure at any point is the total weight of everything above an area of a square metre. So for example the atmospheric pressure at Earth's surface, 101325 Pa, means the total weight of atmosphere above a square metre at the surface is 101325 N. So when you ask for the pressure at the centre of the Earth, the way to calculate this is to work out the ...

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