132,148 reputation
8221365
bio website ratsauce.co.uk
location Chester, United Kingdom
age 54
visits member for 4 years, 3 months
seen 46 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.


40m
reviewed No Action Needed Amplitude $\langle0|e^{-iHT}|0\rangle$ in A. Zee's QFT In A Nutshell
40m
comment Can this RC boat work in thoery?
Yes it will work, but (a) not very efficiently and (b) someone else got there first!
41m
comment Can this RC boat work in thoery?
possible duplicate of Blowing your own sail?
43m
reviewed No Action Needed How to derive velocity pressure in English units?
44m
comment Test to determine if universe is infinite or not
@BinaryGeek: yes. Asher's answer is correct. We may one day prove the universe is finite though we're unlikely to find an edge - more likely is that we'd find the universe was topologically closed. We are very unlikely ever to be able to prove the universe is infinite. I don't like saying we'll never prove it because never is a dangerous word!
1h
reviewed No Action Needed Is the flux through A the same as the flux through B?
1h
reviewed Approve rigid-body-dynamics tag wiki
1h
reviewed Approve rigid-body-dynamics tag wiki excerpt
1h
reviewed Leave Open How realistic is a “bolas” system for artificial gravity in space travel?
1h
reviewed Leave Open Which is more fundamental,''constancy of speed of light'' or ''space-time''?
1h
reviewed Close SONAR - submarine speed detection
1h
reviewed Leave Open Is the second defined arbitrarily?
1h
reviewed Close Gravitoelectromagnetism or graviton thory to derive equivelent formulas to relativity theory
1h
reviewed Close How many kind of effect which generate electricity
1h
comment Test to determine if universe is infinite or not
@SamuelMontgomery: your assumption is not safe. We may well find a theory $A$ that matches all experiments and tells us whether the universe is finite or not. That does not mean there isn't another theory $B$ that also matches all experiments but predicts the universe size to be the opposite of what theory $A$ predicts.
2h
comment Kirchhoff's junction and loop rules
This is either a homework question or a failure to do even the most basic Google search. Either way it's not appropriate here.
2h
comment Electrostatic field in a vacuum
If the direction is constant doesn't that mean the field lines will all be parallel, in which case the magnitude can't vary?
2h
comment Why a timelike geodesic maximizes path length?
There is a related question here.
2h
answered Why does plugging a hole in an airplane's fuselage result in a huge (10x) atmospheric pressure spike?
2h
comment If Earth and Jupiter are orbiting around Sun in same orbit, will they have same time period?
@DavidHammen: good answer though. I must admit my initial reaction was just "yes". We get used to considering the Sun as infinitely massive.