77,451 reputation
178166
bio website ratsauce.co.uk
location Chester, United Kingdom
age 53
visits member for 3 years, 3 months
seen 2 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.


Apr
15
reviewed Close Is there any distinction between these products: scalar, dot, inner?
Apr
15
reviewed Close Why can computer circuits recognise only two states?
Apr
15
reviewed Close Loop-the-loop question
Apr
14
comment What is the notion of a spatial angle in general relativity?
Locally spacetime is flat and you can measure angles just as Euclid did. I don't see the problem with calculating the worldline of the outgoing photon. Why is this hard?
Apr
14
reviewed Approve suggested edit on How to sum over final, and average over initial color states?
Apr
14
reviewed Looks Good Does a charge experience no force due to electric field produced by it?
Apr
14
reviewed No Action Needed Strain energy density in index notation
Apr
14
reviewed Leave Open How to measure the effects of the rotation around the Sun?
Apr
13
comment Duration of Satellite orbit in the shadow of the Earth
I was going to sketch out the approach, but I found that doing this amounted to answering the question anyway. It's not clear to me this is set homework, though it's homework-like. If it was set homework I hereby apologise to Radda's teacher!
Apr
13
reviewed Leave Closed How can a pion with neutral charge exist?
Apr
13
reviewed No Action Needed Kinematics - Find theta with Coefficient of Friction?
Apr
13
reviewed Approve suggested edit on Kinematics - Find theta with Coefficient of Friction?
Apr
13
answered Duration of Satellite orbit in the shadow of the Earth
Apr
13
answered How much smaller will be human body, when we hypothetically get of every space between particles
Apr
13
comment How to use specific heats and temperature change in a system to calculate mass?
Can you give a sample problem of the type you're considering? Then we can show you how to work through that problem.
Apr
13
answered Relation between shm and circular motion
Apr
13
comment Why no longitudinal electromagnetic waves?
Yes, but they're really sound waves in a charged gas not EM waves.
Apr
13
comment Confused about fire?
@KirkWoll: everything that is hot emits light, whether it's carbon particles in a flame or metal heated in a forge. This is black body radiation. See the link in my answer, or have a read through the answers to What are the various physical mechanisms for energy transfer to the photon during blackbody emission?.
Apr
12
answered Why does an electric motor burn up when you physically stop it?
Apr
12
comment Why does diffraction depend on wavelength?
That's an awfully broad question. You're basically asking us to explain diffraction to you. I would start by browsing the Hyperphysics pages on diffraction and come back to us with specific questions.