147,093 reputation
13250412
bio website ratsauce.co.uk
location Chester, United Kingdom
age 54
visits member for 4 years, 7 months
seen 49 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.


14h
comment Does space expansion change value when traveling near the speed of light?
I don't see why you mention dark energy in the title. Dark energy does change the expansion rate, but so does dark matter, ordinary matter and radiation. It's a good question about the expansion rate as observed by a non-comoving observer, but it has nothing specifically to do with dark energy.
19h
comment about motion in 1D
Hi Lakshya and welcome to the Physics SE! Please note that this is not a homework help site. Please see this Meta post on asking homework questions and this Meta post for "check my work" problems.
1d
comment The universe is said to have begun as a singularity, but how do we know nothing else existed?
The Big Bang didn't happen at a point.
1d
comment if you feel that a wire is warm,what will you check or do?
Hi and welcome to the Physics SE! Please note that this is not a homework help site. Please see this Meta post on asking homework questions and this Meta post for "check my work" problems.
2d
comment Finding the speed of a car
Hi and welcome to the Physics SE! Please note that this is not a homework help site. Please see this Meta post on asking homework questions and this Meta post for "check my work" problems.
2d
comment Change without Work
In that case you are in effect asking if there is any such thing as a totally free particle. The answer is (as far as we know) no there isn't.
2d
comment A few questions about gravity
Have a look at this question, this question and this article.
2d
comment A car honking it's horn, how long until the car hears the sound reflected?
Hi Ben and welcome to the Physics SE! Please note that this is not a homework help site. Please see this Meta post on asking homework questions and this Meta post for "check my work" problems.
2d
comment Altering a model to account for another variable
Hi Philip and welcome to the Physics SE! Please note that this is not a homework help site. Please see this Meta post on asking homework questions and this Meta post for "check my work" problems.
2d
comment How to find forces in wires at equilibrium
Please note that this is not a homework help site. Please see this Meta post on asking homework questions and this Meta post for "check my work" problems.
2d
comment Can any one explain how to obtain the frequency distribution versus density of state, from dispersion relation?
You've already asked this, and the previous attempt was closed as unclear. Please don't just ask exactly the same question again. Make some attempt to research the area then ask a more precise question that we can usefully answer.
Aug
30
comment Can any one explain how to obtain the frequency distribution versus density of state, from dispersion relation?
possible duplicate of How to obtain phonon frequency spectrum from dispersion relation
Aug
30
comment effect of materials on period of pendulum
Hi and welcome to the Physics SE! Please note that this is not a homework help site. Please see this Meta post on asking homework questions and this Meta post for "check my work" problems.
Aug
30
comment Change without Work
Yes, for example this happens in a Joule expansion. To get a more interesting answer you'll need to be more precise about what you're asking.
Aug
30
comment Dark Energy and Wormhole stability
You discuss dark matter, but Rich asked about dark energy.
Aug
29
comment Block over a Block Problem.
Hi Mrinal and welcome to the Physics SE! Please note that this is not a homework help site. Please see this Meta post on asking homework questions and this Meta post for "check my work" problems.
Aug
29
comment Differentiation of a vector with respect to a vector
That's what a Lie derivative is - sort of.
Aug
29
comment How do you calculate minimum speed for a mass to move vertically in a circle
Hi James and welcome to the Physics SE! Please note that this is not a homework help site. Please see this Meta post on asking homework questions and this Meta post for "check my work" problems.
Aug
29
comment Laser Energy Level Transitions
I'm unfamiliar with laser physics, but those look like term symbols
Aug
29
comment Radio active isotopes
Hi Sannethah and welcome to the Physics SE! Please note that this is not a homework help site. Please see this Meta post on asking homework questions and this Meta post for "check my work" problems.