109,103 reputation
4166295
bio website ratsauce.co.uk
location Chester, United Kingdom
age 53
visits member for 3 years, 9 months
seen 1 hour 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.


Jun
19
answered What does adding a visible light blocking IR filter do with heat?
Jun
19
reviewed Leave Closed Does time actually exist or is there just a single stateful system being updated over time?
Jun
19
reviewed No Action Needed To find the center of charge in current waveform
Jun
19
awarded  Enlightened
Jun
19
reviewed Close Convert an angle
Jun
19
reviewed Close Can magnets destroy notification light on phone?
Jun
19
reviewed Close Simple units question (School)
Jun
19
awarded  electrons
Jun
18
comment Can the cosmological constant change with time?
@dmckee: I don't think Sébastien is asking about fundamental constants changing. At least, that's not how I interpret the question.
Jun
18
comment Illustrate the transition from linear to rotational kinetic energy
Falling off a ladder?
Jun
18
comment Curl of an electromagnetic wave?
This article has a nice explanation of what a plane wave is and how to calculate its curl.
Jun
18
revised Curl of an electromagnetic wave?
Correct typo
Jun
18
comment Why does time dilation cause you to age slower? And is time considered relative to the observer?
My answer to the question Is gravitational time dilation fundamentally different than other forms of time dilation? explains exactly how time dilation occurs, though without calculus I suspect you'll struggle.
Jun
18
comment How big or small is a reference frame in Relativity?
Have a look at the top few Q./As in this search. I'm not sure that there is an exact duplicate of your question, but I think reading the answers to the first few questions will also answer yours.
Jun
18
answered Can the cosmological constant change with time?
Jun
18
comment How is a vacuum formed and measured by this pneumatics attachment?
The vacuum is created by Bernoulli's principle. The high velocity of the air passing though the horizontal tube lowers the pressure in the side branch. I have never used a pump of this sort that worked with an air stream, but I've many times used this sort of pump that worked using a water stream.
Jun
18
comment Why does time dilation cause you to age slower? And is time considered relative to the observer?
There is simply no way to explain this without going into the maths. Can you give us some idea of what maths you know? Have you studied calculus?
Jun
18
reviewed Leave Open Initial conditions at Lagrange Points
Jun
18
comment Does the pressure inside a tire equal to its average ground pressure?
:-) See, this is what happens when you spend a lifetime working as an experimental scientist!
Jun
18
comment Does the pressure inside a tire equal to its average ground pressure?
@RossMillikan: I was wondering if there's a way to measure the contact patch area for my Ford Focus. I know the tyre pressure and kerb weight, so in principle I could calculate the elastic force. My best idea so far is to drive it onto a piece of paper and spray round the wheel. The contact patch will stay unpainted. I don't particularly want to get paint on my tyres though.