103,619 reputation
4151274
bio website ratsauce.co.uk
location Chester, United Kingdom
age 53
visits member for 3 years, 8 months
seen 3 mins 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.


Sep
11
comment Nuclear fission difference in energy calculation?
@Joseph: because you're calculating the energy of two completely different geometries, so of course you get two different answers. Why would you expect two 8fm spheres to have the same energy as a single 10fm sphere?
Sep
11
answered Is scattering cross section determined by mass?
Sep
11
answered Vectors in non-orthogonal systems
Sep
11
reviewed No Action Needed What is the refractive index of air at high temperatures (> 200 °C)
Sep
11
reviewed No Action Needed Ambiguous points in spontaneous symmetry breaking of discrete symmetry
Sep
11
reviewed Approve suggested edit on What is the refractive index of air at high temperatures (> 200 °C)
Sep
11
reviewed Approve suggested edit on Dependence of sign on operators in wave equation?
Sep
11
reviewed Approve suggested edit on Ambiguous points in spontaneous symmetry breaking of discrete symmetry
Sep
11
comment Does gravity weaken by the square of the distance because the energy is dispersed over the square of the distance
Also see How general relativity gets to an inverse-square law
Sep
11
answered What happens to objects pulled in by black hole?
Sep
11
reviewed Leave Open What happens to objects pulled in by black hole?
Sep
11
reviewed No Action Needed How to calculate the Wald functional?
Sep
11
awarded  uncertainty-principle
Sep
10
reviewed Reviewed Passing a Car With known speeds vs. Time
Sep
10
reviewed No Action Needed spin conservation in exchange polarization process
Sep
10
comment What are Killing spinors?
Can you give us some idea of what research you've already done? For example you provide links to a couple of Wikipedia articles but no indication that you've read the Wikipedia article on Killing spinors. If you have read that article can you give some idea of what the article leaves unclear?
Sep
10
comment Is it possible to create matter from space?
@Kyle: well no, for example we have binary pulsar measurements that strongly suggest GWs are carrying away energy. And of course BICEP2 may still come out smelling of roses.
Sep
10
comment Is a plasma necessarily made of monoatomic ions?
@user121330: that shouldn't stop you posting an answer giving a precise definition. I have to say that since I've heard everything from flames to the photosphere of the Sun being decribed as plasma I think the term is used very loosely. There may well be a precise definition of it, but in practice that precise definition is not adhered to.
Sep
10
comment Is a plasma necessarily made of monoatomic ions?
@user121330: your proposed edit is a rather radical change to my answer. Why not write it up and post it yourself as a new answer?
Sep
10
reviewed Reject suggested edit on Is a plasma necessarily made of monoatomic ions?