141,017 reputation
9242395
bio website ratsauce.co.uk
location Chester, United Kingdom
age 54
visits member for 4 years, 5 months
seen 4 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.


1d
answered Relativistic deceleration and energy
1d
comment What are the dimensions of the stress energy tensor in relativity?
Hi Nihal, my answer to the question I've linked discusses the dimensions of the entries in the stress-energy tensor. Potential energy is not included in the stress-energy tensor.
1d
answered If a super massive black hole captures a very small black hole, would the smaller black hole be immune to spaghettification?
1d
comment Why do we ignore rotational energy in monatomic gases?
Hi Abanob. The link I've suggested isn't an obvious duplicate, but it does answer your question. The rotational energy levels of a single atom are far too widely spaced to be excited under most circumstances.
1d
comment Capturing kinetic energy of air molecules
Google for Maxwell's demon. No, it doesn't violate the laws of thermodynamics, though the argument is surprisingly subtle.
2d
comment What is time and time dilation?
Actually I agree with you that time doesn't flow, but this is unrelated to why time dilation happens.
2d
comment What is time and time dilation?
Hi Dan. Not my downvote, but have a look at the answers to Time dilation. Why? and compare them to your answer. You have made no attempt to explain in terms of fundamental physical principles. Time dilation is easily explained when you understand the basic principles of special relativity, but any attempt to explain it without these principles is hopelessly vague.
2d
comment What is time and time dilation?
See the question Time dilation. Why? and the answers to it. I'm afraid it's a starting point for this site that you have to take the physics seriously and put in the work to understand the maths. This isn't a popular science level site.
2d
comment How does relativity work?
Hi Dan. I'm afraid this isn't the place for such basic questions. There are lots of popular science books about relativity, and your best bet is probably to start with one of them.
2d
reviewed Leave Closed What exactly is 'crosses of light'?
2d
reviewed Reviewed Reference wave and wave travelling through a medium - refractive index
2d
comment Reference wave and wave travelling through a medium - refractive index
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.
2d
reviewed Close Problem based on equations of motion
2d
comment Problem based on equations of motion
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.
2d
reviewed Close Forces that fall under gravitational forces
2d
reviewed Close Fall of intensity - distance
2d
reviewed Close Are we able to store low energy positrons in a magnetic field for arbitrarily long time?
2d
reviewed Leave Closed Can I teach myself physics (LQG specifically)?
2d
comment Can I teach myself physics (LQG specifically)?
I'm voting to close this question as off-topic because it's about learning physics rather than physics itself
2d
reviewed Reviewed Vector addition