109,726 reputation
5167295
bio website ratsauce.co.uk
location Chester, United Kingdom
age 53
visits member for 3 years, 9 months
seen 1 hour ago

Semi retired old time computer nerd who started programming on a Commodore Pet.

Since I'm also active in the Physics forum I should add that I started as a theoretical chemist, moved into solid state photochemistry and finally worked in industry as a colloid scientist. I only became a full time computer nerd in 1997.


Oct
28
awarded  Great Answer
Oct
28
comment Nuclear fusion and the Sun
There is a related discussion here.
Oct
28
comment Is a model of helium atom without electron-electron repulsion solvable analytically?
Even classically a three body problem has no analytical solution. While it's possible the quantum system would be simpler than the classical one it seems unlikely.
Oct
28
reviewed Leave Open The Time That 2 Masses Will Collide Due To Newtonian Gravity
Oct
28
comment My idea on parallel universes
You might also be interested to read about brane cosmology. Note that this idea is highly speculative with no experimental support for it.
Oct
28
revised Determining Acceleration Based On Graph
Minor clarification
Oct
28
comment Should the answer to Einstein & Quantum gravity be found in conditions of our local observable universe?
I'm afraid the problems with quantum gravity are rather more fundamental then accounting for local inhomogeneities in average density.
Oct
28
answered Determining Acceleration Based On Graph
Oct
28
revised Does a ball spin more from left to right than it does from right to left?
Add link
Oct
28
reviewed Delete Conservation of angular momentum with different signs of angular momentum?
Oct
28
reviewed No Action Needed Does a ball spin more from left to right than it does from right to left?
Oct
28
reviewed Leave Closed Newtonian gravity in 3D space, with 2 point masses, calculus, no approximations
Oct
28
comment Newtonian gravity in 3D space, with 2 point masses, calculus, no approximations
Hi Jenny. We are (I think) a helpful open community, but we're a bit sensitive to people asking things they can easily find themselves. The two body problem is well described in the Wikipedia article and I don't see how we can improve on it here. For more than two bodies there is no analytic solution so you'd have to solve it numerically. The methods described in the Wikipedia articles apply to non-gravitationally bound systems like a comet in a hyperbolic orbit.
Oct
28
reviewed Close Qualitative idea of viscosity
Oct
27
awarded  Guru
Oct
27
comment What does negative absolute temperature mean?
Lots of related questions
Oct
27
answered How is Kirchhoff's voltage law understood in the water flow analogy?
Oct
27
reviewed Reviewed Forces in parallel and perpendicular components
Oct
27
reviewed Close Derivation of wave-velocity from a wave-equation
Oct
27
comment Electrolysis of Paramagnetic Ferric Chloride in Water
Is it possible the line is due material being dissolved from the electrodes?