143,615 reputation
13244402
bio website ratsauce.co.uk
location Chester, United Kingdom
age 54
visits member for 4 years, 6 months
seen 19 secs 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.


14m
comment Three blocks on inclined plane problem
Hi Sanchayan. 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.
44m
comment Can everything be described without anything needing to actually “bend”?
Hi Henrik. While it's always fun to try and think up new theories for why gravity works you really need to understand the current theories for your ideas to make sense. As it stands, your question is unanswerable because it's meaningless. You'd need to formulate your ideas in a more precise way for anyone to comment constructively on them. In particular you'd have to explain why your ideas are better than general relativity, which is going to be hard since GR does an awfully good job of explaining the universe.
48m
comment Eliminating IR light reflection perceived by a steep viewing angle
If you have a new question, please ask it by clicking the Ask Question button. Include a link to this question if it helps provide context.
49m
comment Find the total energy stored in the network at the time of steady state?
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.
51m
comment Would a person gain or lose weight after expelling a flatus?
Why the downvote? On the basis of good taste? :-) This seems a perfectly reasonable question, and I'm sure I saw it asked in the New Scientist Last Word column recently, though I forget the answer.
53m
comment Would a person gain or lose weight after expelling a flatus?
0-50% hydrogen? Really? So instead of igniting our farts we should be attaching fuel cells to our bottoms.
1h
comment How does gravitational time dilation work in artificial gravity made by rotating a cylinder?
Ed's answer is correct, though it would be nice to see the working behind the answer. As it stands, the answer is not going to improve anyone's knowledge of relativity.
1h
comment How does gravitational time dilation work in artificial gravity made by rotating a cylinder?
Hi Joe. If you look at my answer to the question I've linked I explain how to calculate the time dilation for rotational motion. It's for a centrifuge rather than a space station, but the calculation is exactly the same. As Ed says in his answer, the time dilation is the same as time dilation for straight line motion at the same speed.
1h
comment How does gravitational time dilation work in artificial gravity made by rotating a cylinder?
possible duplicate of Can a ultracentrifuge be used to test general relativity?
16h
comment Question to find distance at which 2 trains will pass each other
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.
19h
comment Why is the index of refraction different for different wavelengths?
To be fair this is true for most optically transparent materials at visible wavelengths. The refractive index becomes anomalous when the light energy reaches the band gap energy, and for most transparent materials the band gap energy is in the uv.
21h
comment Many cells in parallel
If you connect cells in parallel then the net potential difference depends on the internal resistances of the cells so you need to specify these.
21h
comment Proof of Poisson equation in a gravitational field
I'm voting to close this question as off-topic because it shows insufficient effort
21h
comment Proof of Poisson equation in a gravitational field
Doing an obvious Google search found lots of articles explaining this, including this one of Wikipedia‌​. Are you having problems understanding the derivation? If so, can you extend your question to indicate where the stumbling blocks are?
21h
comment Angle sum of triangle in Schwarzschild solution
How are you going to define the straight lines that make up the sides of your triangle? Null geodesics i.e. the lines followed by light rays?
1d
comment What is extension produced in spring?
Hi Prasenjeet 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 Point of getting each other after chasing!
Hi Michaele 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 Are there any benefits from doing Physics MCQs without a given answer key?
Hi Larry. I also find it frustrating when books don't give answers. However for many well known books you'll find answers on the Internet. Try Googling for the text in the question.
1d
comment variation of electrostatic potential on moving radially outwards from the nucleus of an atom
@Abhirikshma: I don't have electron density data to hand, but outside the atom the potential will be close to zero, in the outer reaches of the atom it will go as $1/r$ and near to the nucleus it will go as $Z/r$, where $Z$ is the nuclear charge. In between it will transition smoothly between those two limits.
1d
comment Area under v-t and a-t graphs
In that case you're correct, the area under the graph does not equal the change in magnitude of the velocity.