Recent content by willem2

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Does anyone know what triangular constraint is?

The triangle inequality. The distance(A,C) <= distance (A,B) + distance(B,C)
- willem2
- Post #3
- Nov 11, 2010
- Forum: Ask a Technical Professional
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A spoonful of neutron star

The amount of energy needed to lift it out is a lot more than that. Most of the gravitational energy of the collapse of the star has escaped in the form of neutrinos during the supernova explosion, and you have to provide that as well to lift something out. IF we can build something that can...
- willem2
- Post #25
- Oct 18, 2010
- Forum: Ask a Technical Professional
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A spoonful of neutron star

Sorry, now I was using a very small teaspoon, I meant 0.0025 l or 2.5 ml. So that will still give 5.9 E 38 neutrons/teaspoon. I don't think that 2 MeV neutrons can penetrate more than a few tens of metres of rocks, so a significant fraction of the 10^25 J will go into heating up and...
- willem2
- Post #18
- Oct 12, 2010
- Forum: Ask a Technical Professional
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A spoonful of neutron star

This is actually exactly what I meant. Because the neutrons must occupy different states, they need to occupy states with very high energies. You can get some idea of this using the uncertainty principle The density of a neutron star is about 4*10^17 kg/m^3 (in the middle, scooping up a...
- willem2
- Post #16
- Oct 12, 2010
- Forum: Ask a Technical Professional
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A spoonful of neutron star

The only thing that prevents collapse in a neutron star, is that the neutrons have very large velocities. If you remove the surrounding material, all those neutrons will fly off, with very large speeds, much larger than those in a nuclear explosion, enough to split any atom. About half of those...
- willem2
- Post #11
- Oct 12, 2010
- Forum: Ask a Technical Professional
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Can this problem be solved using Linear Algebra? Proof type problem.

If (A,B,C,theta) is a solution, then so is (tA,tB,tC,theta). This means that it won't be possible to find A, B and C (unless A=B=C=0), but finding theta might be possible. If C<>0 then you can set C=1 because it won't make a difference to theta, and then try to find A, B and theta because you...
- willem2
- Post #13
- Oct 12, 2010
- Forum: Ask a Technical Professional

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Recent content by willem2

Does anyone know what triangular constraint is?

A spoonful of neutron star

A spoonful of neutron star

A spoonful of neutron star

A spoonful of neutron star

Can this problem be solved using Linear Algebra? Proof type problem.