130,059 reputation
8215355
bio website ratsauce.co.uk
location Chester, United Kingdom
age 54
visits member for 4 years, 2 months
seen 12 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
3
comment Is the Higgs Boson a Force Carrier?
See also Why isn't Higgs coupling considered a fifth fundamental force?
Sep
3
comment Is the Higgs Boson a Force Carrier?
possible duplicate of Do massive particles exchange Higgs bosons?
Sep
3
comment Minkowski spacetime vs Euclidian space
@frodeborli: yes indeed, the distance calculated along the worldline this way is called the line element or the proper time. For a freely falling observer it's equal to the time shown on a clock carried by the observer. The line element is an invariant quantity in both SR and GR.
Sep
2
comment What cosmic event would cause Sun rising from the west?
@akrasia: you should post that as a question. Broadly, the Earth bulges out at the equator and the Moon pulls on the bulge and stops it moving too far out of the plane of the Moon's orbit. However I'm not sure I have ever seen a really clear description of the effect.
Sep
2
comment What is supersymmetry?
This question appears to be off-topic because it is shows insufficient prior research
Sep
2
comment What is supersymmetry?
Have you read any of the easily Googled articles on supersymmetry? If so can you make your question a bit more precise to indicate what aspects of it are giving you problems?
Sep
2
comment Measuring mass by acceleration due to electromagnetic forces in free fall
Exactly this technique is used to measure the mass (well, charge to mass ratio) of subatomic particles. Can you expand on your question to say why you think there might be an issue with macroscopic particles?
Sep
2
comment How do people calculate proportions of dark matter, dark energy and baryonic matter of the universe?
@gwho: the process for calculating the best fit values of the parameters is iterative, yes.
Sep
2
comment $\mathrm{CO_2}$ rate of deposition
It's been suggested. I don't know how seriously the suggestion has been taken, though Googling finds lots of rferences to this paper.
Sep
2
comment What is light and how does it travel?
That's a question for philosophy.stackexchange.com
Sep
2
comment What is light and how does it travel?
And the answer is quantum electrodynamics.
Sep
2
comment What is light and how does it travel?
Let's be clear about this, the ultimate arbiter is experiment. If our theories make predictions that are borne out by experiment then we consider our theories to be good. The theory used in this case, Quantum Electrodynamics, makes exquisitely accurate predictions.
Sep
2
comment What is light and how does it travel?
The point is that your question is predicated on the assumption that there is a problem with light propagating in a vacuuum. The point of the question I linked is that no such problem exists. Light is an excitation in a quantum field, and that quantum field fills all of spacetime so there is nothng mysterious about the fact light can propagate in a vacuum. There is some justification to your complaint that the answer comes down to it just works, but at the popular science level that's about all you can say.
Sep
2
comment How can I split a resultant force into its $x$ and $y$ components?
In particular note that $\sin\theta = 0.3/0.5$
Sep
2
comment What is light and how does it travel?
possible duplicate of How is a vacuum able to propagate light?
Sep
2
comment Does the pressure in a pressure tank depend on the amount of air?
Can you clarify what you're asking? Obviously if you increase the air pressure in the tank it will push the water out faster. Were you after an equation to predict the relationship between the water flow rate and tank pressure?
Sep
2
comment Why photon has a wave nature?
Hi Sara, you might be interested in searching this site for wave particle duality as there have been lots of related questions.
Sep
2
comment How do people calculate proportions of dark matter, dark energy and baryonic matter of the universe?
@gwho: you put in initial guesses for the values of the parameters, then you use the model to compute the CMB spectrum and you compare it with the observations. Unless you made extraordinarily lucky guesses your calculation won't match reality, so you start adjusting your parameters to improve the fit.
Sep
1
comment Application of Newton's third law
Have you tried Googling for how does a rocket work
Sep
1
comment Can expansion of space create energy?
possible duplicate of extracting energy from cosmological expansion