109,716 reputation
5167295
bio website ratsauce.co.uk
location Chester, United Kingdom
age 53
visits member for 3 years, 9 months
seen 5 hours 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
27
comment Newtonian gravity in 3D space, with 2 point masses, calculus, no approximations
This question appears to be off-topic because it shows insufficient prior research
Oct
25
comment Straining/burning sensation in eyes
This question appears to be off-topic because it is about human physiology not physics
Oct
25
comment Concerning the transtition between matter dominated universe and radiation dominated universe
@Gödel: the scale factor was calculated using equation (2) in the linked answer. This contains all four parameters. Are you asking about the equation I used for the fit? If so, this equation has no physical significance - it just happens to fit the curve well.
Oct
25
comment Electrolysis of Paramagnetic Ferric Chloride in Water
Ferrous Chloride is Iron (II) Chloride. Ferric Chloride is Iron(III) Chloride. Which did you mean?
Oct
25
comment How derivate paradox of dicressiang the charge in Liénard–Wiechert potential?
Well I've partly corrected the title, but the word dicressiang has defeated me.
Oct
25
comment What type of the charge particle were there at time of formation of the solar system according Nebular hypothesis.?
The nebula that formed the Solar system was presumably similar to the other nebulae we see nearby. Have you tried Googling for the composition of nebulae?
Oct
25
comment What does one get when admitting negative mass?
I think you should do some Googling, because there are a thousand articles on this subject out there in Googlespace. If you have specific technical questions about the subject then ask them as a separate question.
Oct
25
comment constant $c$ in Lorentz force
The form of the equation you've seen is using cgs-Gaussian units. See this Wikipedia article for more.
Oct
24
comment Concerning the transtition between matter dominated universe and radiation dominated universe
@Gödel: no, all four contributions to the density are treated together.
Oct
24
comment Concerning the transtition between matter dominated universe and radiation dominated universe
@Gödel: see How does the Hubble parameter change with the age of the universe?. This shows how the scale factor is calculated taking into account radiation as well as matter.
Oct
24
comment What are the advantages of Magnetocardiography?
I'm not sure this is really a physics question.
Oct
24
comment About time measurements
This is really a new question, but see for example this SciAm article (you'll need a login).
Oct
23
comment How does Hendo hoverboards achieve the self-propelling motion? What is the MFA?
@Hypnosifl: possibly, but the Hendo engine uses rotating permanent magnets.
Oct
23
comment How does Hendo hoverboards achieve the self-propelling motion? What is the MFA?
@jim: indeed, and there are lots of ways to make things hover. However there are none based on negative energy. If Luxii wanted to change the question to ask how a Hendo hoverboard works then that would be a good question and I'd remove my close vote.
Oct
23
comment what kind of wings would a person need to fly?
Related: Is it possible to fly like a bird using semi-motorized wings?
Oct
23
comment At what velocity does space no longer equal a vacuum?
Are there no (other) SF fans reading this? The quote is about streamlining ships to deal with the 5 Hydrogen atoms per m$^3$ density of insterstellar matter at near light speeds. As it happens the question is a duplicate and the issue has been discussed in Would a fast inter-stellar spaceship benefit from an aerodynamic shape?. tl;dr you need to be very, very close to the speed of light for the effect to become important.
Oct
23
comment About time measurements
It isn't clear to me why you think the continuity of time and the illusion of time flowing are incompatible, or even related.
Oct
22
comment Discrepancy in introducing Schottky barrier
The bands aren't discontinuous because the junction isn't infinitely thin. The energy level varies continuously (but steeply) across the junction. The force on carriers is indeed very high, but it acts only over a very short distance. The force times distance is of course equal to the difference in the energy levels.
Oct
20
comment Which moves faster in a time $t$: $A$ or $B$?
What you need to know to solve this is that the drag on a sphere is given by $F_d = \tfrac{1}{2}C_d \rho A v^2$, where $A$ is the cross sectional area $\pi r^2$ and $v$ is the velocity. $C_d$ is a constant and $\rho$ is the fluid density - neither of these depend on the size of the sphere.
Oct
20
comment Is ohm's law violated in electric transmission lines?
It's the electrical potential at the generating station.