132,263 reputation
8221366
bio website ratsauce.co.uk
location Chester, United Kingdom
age 54
visits member for 4 years, 3 months
seen 12 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.


12h
reviewed Close What sort of propulsion technology would allow spaceships to lift off the surface of the Earth and ascend into space like we see in sci-fi movies?
12h
comment When and who by was the earliest definition of speed?
You might also want to ask on History of Science Stack Exchange as they specialise in this sort of thing.
12h
comment When and who by was the earliest definition of speed?
Also see Aristotle's Physics Book VII Part 5. This clearly describes motion as distance covered in a specified time.
12h
revised Is there a difference between Electric and Electrostatic Field?
Trivial tidying
12h
comment Is Brent's accelaration zero at any point? If so, where?
Hi Marzanur 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.
13h
comment Protons and Neutrons Overshoot Actual Mass?
Hi Arturo, see the question I've linked. This explains why the binding energy is negative. I made exactly the same mistake when I first started studying physics!
1d
comment Can this RC boat work in thoery?
Yes it will work, but (a) not very efficiently and (b) someone else got there first!
1d
reviewed No Action Needed How to derive velocity pressure in English units?
1d
comment Test to determine if universe is infinite or not
@BinaryGeek: yes. Asher's answer is correct. We may one day prove the universe is finite though we're unlikely to find an edge - more likely is that we'd find the universe was topologically closed. We are very unlikely ever to be able to prove the universe is infinite. I don't like saying we'll never prove it because never is a dangerous word!
1d
reviewed No Action Needed Is the flux through A the same as the flux through B?
1d
reviewed Approve rigid-body-dynamics tag wiki
1d
reviewed Approve rigid-body-dynamics tag wiki excerpt
1d
reviewed Leave Open How realistic is a “bolas” system for artificial gravity in space travel?
1d
reviewed Leave Open Which is more fundamental,''constancy of speed of light'' or ''space-time''?
1d
reviewed Leave Open Is the second defined arbitrarily?
1d
reviewed Close Gravitoelectromagnetism or graviton thory to derive equivelent formulas to relativity theory
1d
reviewed Close How many kind of effect which generate electricity
1d
comment Test to determine if universe is infinite or not
@SamuelMontgomery: your assumption is not safe. We may well find a theory $A$ that matches all experiments and tells us whether the universe is finite or not. That does not mean there isn't another theory $B$ that also matches all experiments but predicts the universe size to be the opposite of what theory $A$ predicts.
1d
comment Kirchhoff's junction and loop rules
This is either a homework question or a failure to do even the most basic Google search. Either way it's not appropriate here.
1d
comment Electrostatic field in a vacuum
If the direction is constant doesn't that mean the field lines will all be parallel, in which case the magnitude can't vary?