DrP

It's been sooo.. long since I done this. Don't the 4s ones fill up after the 3d ones are only half full? They sort of give a stable half shell then the 4s levels start to fill as a full 4s shell is more stable than 3d shell with 6 or 7 electrons.

Well, err... , ehem, err.. yea of course! Of course... I would have sent on the bottles of wine if we had won them.. of course! .. but they've stopped it now so I'll let you know if they start again. Bye for now!........ hic!..

Smoke pot - be a record breaking champion of the whole world!!

I don't know for sure - but here is my guess. Please shoot me if I am wrong. When copper is cooled down - the metal contracts. I don't see how it could contract unless the atoms were getting more closely packed together. As it heats up, the atoms would vibrate more and the distance between them would increase and the overall parameters of the piece of metal expand. I'm sure it's more complex than that - but that would be my 'off the top of my head' guess. Would need to look it up for actual real world scientific answer (not DrP's imaginary world answer).

OK - the company that was running this has stopped it for now at least. Shame - I was quite enjoying it. Thanks for your help people - even though we didn't get a single one right! I've deleted the pics to make room in my alloted SFN piccy space. Will post again if they ever start it up once more.

or bacon. Brie and bacon is good.

I just thought - If I ever become famous i reckon there are some people from my uni days that might well crawl out of the woodwork with some embarasing pics.

errr.... sounds great!..... too good to be true even - what am I/we missing?

Not wanting to open a can of worms - just my understanding of the definition: any thing worshiped as a god or God is a god. Chocholate or some footballers are gods to some people. There is only one God. As I said - this is how I've always understood the definitions.

You're over complicating matters - see diagram:

Again - this will depend on the quantities you are trying to buy/sell. Might be worth looking in a chemical catalogue or at an on-line chem supplier for ball park figures. When you have descide what and how much you want to buy then ring (or e-mail) a couple of them to get some quotes.

It's from latin. Mono-Mer - 'Mono' meaning single, 'Mer' meaning unit. Also - Poly-Mer - 'Poly' Meaning many, 'Mer' - again meaning unit or units. Therefore - Monomer = single unit or building block. Polymer = many units - usually a long chain in chemistry. DNA is a very large molecule and, I would presume, is classed as a macromolecule. (again - this is probably latin - 'Macro' meaning very large I think!?)

It depends where you buy it and how refined/processed it is - and also how much of it you want to buy/sell. The compamy I work for pays arround £1.50 - £2.00 per kilo of RED iron oxide powder - nicely processed into 25kg bags and it comes on a pallet of 1000kg (I think the particle size is arround 30 microns mean size). Other suppliers charge alot more for different grades with surface treatments and or finer particle sizes or tighter size distribution of particles, or better intensity of colour from the pigment. I've seen it as much as £6.00 per kilo. (I think the £6.00 per kilo stuff was for 250kg lots and it gave a more intense/brighter red - so it really does depend on quantities) Hope this helps.

I think he means that it was accidental. When we bombed Iraq a few years back - one of our cruise missiles landed in Iran!

Could be the sound of the wax squishing in your ear as you poke your finger in? Subtle movements of your fingers brushing skin on small scale? You will hear internal body sounds that you normally wouldn't as well. I'll listen to the youtube thing when I get home - supposed to be working now.

I shouldn't think anything would happen to it all. Is there some function equating magnetic field strength to temperature then? I can't remember it if there is one - except that at 'high' temperatures you can loose ferromagnetism (currie point?? ). Also the more I think about it there more I wonder what you mean. Do you mean that the surface freeses (as in zero degrees all over). Or the whole earth, magma and all solidifying to the core? Either way I still think the magnetic field would remain intact.

Anything that changes the molecule from one chemical to something different is chemical. If you lose an electron the atom/molecule becomes something different, the chemistry of that molecule or atom is different - thus the effect is chemical. Some areas are taught in physics as well as chemistry (like density, ionisation,electricity etc..) and can be put into the area of chemical physics, but I would say ionisation energies are a chamical occurance. Example of the fine line at a basic level: Electricity! Chemical or physical or both? The properties of electrical circuits are covered as physics. The movement of the electrons is physics (or chemical physics - but is covered in chemistry lessons as well). The battery where these electrons are produced is covered as chemistry. It is all physical science (Chemistry and Physics), our chemistry teacher told us that anything to do with electrons is chemistry. I've always thought of ionisation energies as chemistry- electrons are leaving atoms - thus the chemistry changes. I would agree that it is a fine line though -- I was a bit confused by atomic radius - chemical or physical or both?.

I do. I don't really wan't to discuss why. I am a scientist and I believe in God. I hope I don't loose anyone from my freind list for this! Sometimes my faith gets challanged and I get tempted to change to the agnostic group as I don't think anyone can 'prove' anything either way - that's kind of why it is faith. Haven't been to church for years and probably won't for some time. I try to be a nice person, but I am a human being and can be a very naughty boy as well as a saint.

Why would they visit the Awful tower? We've got 10's of thousands of similar structures here - OK they are a bit smaller, but they look they same!

But energy will be lost to heat from friction as the rubber ball un-squishes - sorry to put a downer on it. Never mind - no-one has.

Pictures are nice. Why not build a prototype?

The gravitational effect of an object on another body decreases with distance. It's an inverse square relationship - so at distances past a certain threshold the effect is negligable and you feel weightless. Force = G.m1.m2 / 4.pi.epsilon0.r^2 (sorry - will sort it out with LaTeX LaTeR oN - in a hurry:-))

Chemical deals with the actual make up of the molecules and electronic structure. Physical deals with the 'physical' properties. e.g. when a liquid (like H20) boils there is a physical change from liquid to gas - but the chemical is still the same - it is still H20. Same with melting point and density. The density of water changes with temperature (look at what hydrogen bonging does to water at/below 4C) - but it is still H20 - thus density is a physical property... What about the others?

I'd say 8 - and then rotate it 90degrees.

I've always been a fan of today's hardware with last years software. PC runs at a usable speed then.