131,887 reputation
8220365
bio website ratsauce.co.uk
location Chester, United Kingdom
age 54
visits member for 4 years, 3 months
seen 5 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.


2d
comment Is there an Ideal Liquid Law? Or Solid Law?
@HyperLuminal: the whole point of an ideal law is that it applies to all materials. If a law applies to only a specific element than it isn't ideal.
2d
comment Find out average speed
Hi Laasya 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.
Apr
22
comment How can light experience a force
It's not clear you're saying anything not already covered in the duplicates that have been flagged.
Apr
22
comment Double Pipe Heat Exchanger
No, I don't see why two pipes are necessary. Hot water enters the radiator, is cooled by the air, then leaves the radiator as cold water. I don't see any benefit to having an intermediate step.
Apr
22
comment How can light experience a force
Hi NatureShade. That's a good question, but it's one that has been asked before.
Apr
22
comment Six particles at the corners of a regular hexagon of side $a$ move at a constant speed $v$
possible duplicate of Time taken for collision
Apr
22
comment Does the velocity of a wave change after being reflected against a moving object?
@gorani: Correct
Apr
22
comment Does the velocity of a wave change after being reflected against a moving object?
I guess the downvote is because this looks like a homework question. However if we we ignore the homework aspects I think it is a perfectly fair question about the physics of sound waves.
Apr
22
comment Deriving the geodesic equation
Come now, at least make the effort to research this.
Apr
22
comment Does gravity exist in a vacuum?
@PaddlingGhost: but the field created by a charged body extends into the vacuum surrounding it.
Apr
21
comment Naked Time ( Is there such a thing ?)
Google block universe
Apr
21
comment Why does the sky look blue rather than violet?
Hi Varsha, I've linked an exact duplicate of your question.
Apr
21
comment Is a black hole a 3D hole? And doesn't it pull into the 4th dimension?
Why the downvotes? What's wrong with this question? The difference between extrinsic and intrinsic curvature has perplexed, and will no doubt continue to perplex, many budding young physicists.
Apr
21
comment Are there other less famous yet accepted formalisms of Classical Mechanics?
This seems a reasonable question and an interesting one. For example I had not heard of Kane's method until Jiminion mentioned it. I doubt the knowledge will revolutionise my life, but these things are always interesting to know.
Apr
21
comment Fraction of kinetic energy carried by neutrons after D-T fusion
To answer that consider how does the energy released compares to the rest mass of a neutron?
Apr
21
comment Fraction of kinetic energy carried by neutrons after D-T fusion
The momenta of the helium nucleus and the neutron must add up to zero, and their kinetic energy must add up to 2.823 pJ.
Apr
21
comment Which units are affected if we double the unit of length/velocity or force?
Hi Rohan 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.
Apr
20
comment Wind blows to surface, how long legs I need?
Hi Artūrs 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.
Apr
20
comment Neutron star: escape velocity
@gamma1954: yes, this book
Apr
20
comment Neutron star: escape velocity
@gamma1954: if you're doing this for fun start with Schutz. I'm not sure it would be ideal for someone wanting to do research in GR, but it's the most approachable GR book I've ever read.