147,143 reputation
13250412
bio website ratsauce.co.uk
location Chester, United Kingdom
age 54
visits member for 4 years, 7 months
seen 7 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.


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.
Aug
29
comment What came before the Big Bang?
See also this search for lots of related questions
Aug
29
comment Capacitor Charging another Capacitor to a higher Voltage Level?
I suspect that most of us lost the will to live within the first few paragraphs. I wonder if you'd get a more entusiastic response on the Electronics Stack Exchange.
Aug
28
comment Difference between mass and weight
Hi Waleed. You don't need to apologise. Your question is a duplicate, but searching this site to see if your question has been asked before isn't easy. I didn't downvote your question and I think the downvotes are unfair. Have a look at the previous question and see if it does give you the answer you want.
Aug
28
comment What was the motivation behind the work formula?
You could try Googling it to find out ...
Aug
28
comment Difference between mass and weight
Hi Waleed. Your question has been addressed many times already. Note that a weighing machine measures weight not mass.
Aug
28
comment Natural Philosophy
I'm voting to close this question as off-topic because it is philosophy not physics
Aug
28
comment Could the Big Bang have simply been two black holes hitting each other at 99% of the speed of light?
No, because the Big Bang didn't happen at a point.
Aug
27
comment Role of special unitary groups in string theory
If you're not familiar with Lie groups I fear that string theory is an ambitious target.
Aug
27
comment IS circuit and Non-IS circuit
This is electrical engineering not physics (IS stands for Intrinsically Safe).
Aug
27
comment How would you describe what the affine parameter is in layman's terms?
The downvote seems unfair. Yes, the question is a duplicate but it wasn't an especially obvious duplicate. The meaning of an affine parameter puzzled me in my early days.
Aug
27
comment Find elongations of truss members
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
27
comment Crushing pressure (15,750 psi) at the bottom of Marinas Trench
I'm voting to close this question as off-topic because it about fish physiology not physics
Aug
27
comment Does the Big Bang Theory explain about the formation and destruction of matter?
My answer to the question If big bang theory is real.. then why do scientists do not accept “matter CAN disappear to Void”? also covers this (though that question itself is a bit rubbish).
Aug
26
comment Frictional pulley
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
26
comment Show that a Hamiltonian system is integrable
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.