104,214 reputation
4151275
bio website ratsauce.co.uk
location Chester, United Kingdom
age 53
visits member for 3 years, 8 months
seen 21 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.


11m
answered Has the universe we live in started as a black hole that is imploding?
39m
answered Why is steel-reinforced concrete stronger than ordinary concrete?
45m
reviewed Delete Why is steel-reinforced concrete stronger than ordinary concrete?
45m
reviewed Delete What exactly is a virtual displacement in classical mechanics?
46m
reviewed Delete String theory from a mathematical point of view
46m
reviewed Leave Open Vertical Travelling - Taking Advantage of Earth's Rotation
46m
comment Vertical Travelling - Taking Advantage of Earth's Rotation
Why does this have three close votes for not mainstream physics? This is a simply question about dynamics so how can it possibly be not mainstream physics?
13h
comment Help with Kinematics and trajectory
Suppose the ball is struck at time zero, and lands at time $T$. If the fielder takes a time $T_f$ to run the 8 metres then he has to start running at a time $T - T_f$ seconds after the ball is struck.
13h
reviewed Leave Closed Projectile motion help needed
13h
comment Help with Kinematics and trajectory
I would guess you haven't got an answer because we generally don't like answering homework questions. Continually reposting the same question isn't a great way to make friends and influence people.
13h
reviewed Close pressure drop in venturi
13h
comment Help with Kinematics and trajectory
possible duplicate of Two Dimensional Kinematics. Help needed
13h
answered Timelike curves in Special Relativity
13h
comment neutrons fission reaction
Because they contain charged quarks, and at high energies the interactions between the individal quarks become significant. See for example Why do neutrons repel each other?
13h
comment neutrons fission reaction
In principle yes, though it's a technical challenge. Neutrons contain quarks just like protons and they scatter due to quark quark interactions.
14h
comment neutrons fission reaction
Neutrons can't be broken into "smaller and smaller neutrons" by colliding them. Can you provide a link to support the claim that they can?
14h
comment Has the universe we live in started as a black hole that is imploding?
Achmed, I've edited your question to make it clearer what you're asking. If I've misunderstood you or you don't like the edits then please roll them back, or comment here and I'll undo my edit.
14h
revised Has the universe we live in started as a black hole that is imploding?
Make the question clearer I hope.
16h
comment Simplifying Friedmann's Equation
@NickI: why not add a comment to my question explaining what you would like clarified. I might be able to extend my answer to address it.
18h
comment Why is graphene the only (stable) 2D sheet structure?
@Danu: that's slightly unfair. The question is asking why only carbon forms hexagonal sheets. For example silicon is the next element down in the group but it does not form molecules with $sp3$ hybridisation (I think there are a few, e.g. disilene, but they're very unstable) and therefore doesn't form structures analogous to graphene. Why not?