John Cuthber

The EU is not planning to legislate for equipment you already own. So your new phone requires one charging voltage. your new personal training logger requires the same your new personal camera/projector requires the same again.

"Is Mutation Directed?" Roughly a third of is get cancer so it seems the answer is that , if mutation is directed, it's clearly not directed in our favour.

You have 200 or so posts and a rep of minus 120 odd. Looks like you are well placed to talk about ego.

Did you see that on CSI or something?

Atmospheric oxidation of glycerin will produce acid products. Also, trying to measure the pH of poorly buffered solutions with pH paper or an ordinary pH meter is very unreliable.

I suspect (but can't cite evidence for it) that the work function or the melting point might be a better indicator of how well the metals resist gallium. I'm also rather inclined to doubt that the Xtal structure makes that much difference (except indirectly) because i think the attack takes place at Xtal boundaries.

I'm shocked that nobody cited this yet. http://xkcd.com/927/

Since time doesn't exist, can you give me next weeks lottery numbers please? Thanks

I think congo red is probably pretty stable. On the other hand the Merck index says it's colour changes with the solvent. So you might be looking at something like a solvatochromic effect. A much simpler explanation would be a pH effect. Is the mixture buffered to keep the pH constant?

"you can only give me links" Obviously, this is a web page, not a convenience store. We can't send anything but ones and zeroes. If you want a physics book (and I think that would be a good idea) try Amazon. "but none of you can explain anything" We can, but you won't listen. instead you make absurd allegations about the whole of science being fraud. "Relativity is just perspective" No, it is, among other things, the reason why your GPS works.

If he answers I guess we will both get to find out.

I'm pretty sure that DMF DMA is a well known reagent. For example, http://www.mn-net.com/tabid/10229/default.aspx and that material is the next homologue. But that seems a rather odd reaction. http://en.wikipedia.org/wiki/Claisen_rearrangement#Eschenmoser.E2.80.93Claisen_rearrangement

What reaction?

"I think this is an unnecessary splitting of hairs. European individuals are those whose ancestors have their point of origin in Europe. This definition is actually very robust" Are you sure about that? I'm fairly sure that all of us have ancestors based in Africa. http://en.wikipedia.org/wiki/Recent_African_origin_of_modern_humans It's an interesting topic, but it needs some very clear definitions to get anywhere.

What colour is a "european" today? I rather suspect that there may now be more black and brown skinned people living in what is currently Europe then there were 5000 years ago in which case the "average" colour is darker than it was. Or are we talking about the group who get called "white" or (even more absurdly) "caucasian" ? If we are, is this in danger of turning into something that looks like the opposite of a "no true Scotsman" fallacy? (We are only counting white people so they are, by definition , just as white as they always were.)

pardon? (Though, for the record, biphenyl is clearly aromatic with 12 electrons; but they are in 2 rings.

I doubt you could sensibly aspire to predict it. On the other hand, you could do what I did and google the phrase "gallium attacks platinum". But that's hardly the point. Why did you post something as a fact when you hadn't checked it was right and, as you say, you had no way to know if it was correct?

As specified, it has 1 sf. However 5.00 degrees has 3sf.

Please read the following extract of that extract "method used in biometrics by which a person purportedly can be identified" "My method is much more secure in theory." Please read the definition of theory http://en.wikipedia.org/wiki/Scientific_theory Please read this account of how to use a laptop as a 'scope. http://www.instructables.com/id/Use-Your-Laptop-as-Oscilloscope/

Does your gps work? If it does, that's your evidence- seen with your own eyes. Are you still going to argue against what you can see for yourself? If so, there's no point asking us for evidence because you are ignoring the evidence that you already have.

Graphite would be OK, but its resistivity is a bit high.

You seem to have missed half the question. Chlorine dissolves quite well in water, even though, like iodine, it is non-polar.

A typical glass is about 10 or 20% sodium (as the silicate. That will leach out with dilute acid at least as well as the uranium will. Did you remove it somehow? Or might your "yield" include roughly 5 times as much sodium as uranium? (And there's also Ca, Mg etc to contend with).

I wouldn't even try to get that molecule down a gc column. Too big, too polar.

It's true that gallium attacks some other metals. however, in most cases the attack is slow. In the sort of timescale that schoolwork takes place over I think the only metal that would be really susceptible would be aluminium. I think copper or stainless steel would be fine. It's not as if you will be using the electrodes in some load-bearing safety critical application afterwards so who cares if they fall apart? Also, I'm pleased to see that you thought about it and checked before getting underway. With a bit of effort, you might be able to show that solid gallium is a rather better conductor than the liquid. If Rktpro thinks you need platinum electrodes then he needs to do a bit more research. For a start, gallium attacks platinum.