DrP

Thank you - I'll stop massaging it into my brests from tomorrow.

Yea - I often think of booze as an emotion amplifier.... Happy people get silly and laugh, angry people can get violent after booze, depressed people get teary and so on..... 'In Vino Veritas' as they say!

Yea - your right - sorry. I was just recalling what they tell children to occupy them during thunder storms. Gives them something to do rather than being scared during a storm - - the lightning strikes and then they count the second to the thunder.. But you are of course right, at 340 m/s the sound will take 4 to 5 seconds to travel 1 mile.

This is kinda relavent - You can see/hear the 'time delay' effect with sound rather than light in a thunder storm. If lightening strikes 3 miles a way you SEE it instantly (more or less) but there is a 3 second delay before you hear it crack as thunder. If it strikes 10 miles away then you get a 10 second gap. Similarly, as explained above, light from the sun takes about 8 second to reach us across the 93 million miles it travels.

To Echo Captain Panic, if you type "Jupiter Moons" into google - the answers are right there.

OK - yea - I just looked up Ga and CO2 on a chart of REDOX potentials and you're right. The Gallium reduces the carbon. I think to be safe, I'd perhaps not use CO2 on metalic fires in future, unless I have that table at hand... http://en.wikipedia.org/wiki/Table_of_standard_electrode_potentials

One thing I noticed on that MSDS Hermantrude was that it says NOT to use CO2 extinguishers in a fire. Anyone know why not? CO2 is usually pretty good as it is inert and doesn't cause spitting like water on liquid fires. I can under stand why it may suggest no water, but why not CO2?

I've never heard of using base one or a half. Probably don't really exist practically. For base 1 you could have : 1 , 11, 111, 1111, 11111, 111111, etc.. for 1,2,3,4,5,6...?

Well it looks very nice - and blue is my favourite colour and all, but,,,, I'm not sure how practical it would be to live in really.

So what colour flame does it give in a bunsen then?

Had it been a multiplication you would add the powers though: 8a^5 b^5 X 10a^5 b^5 = 80a^10 b^10

It was a fan viscometer apparently - they got NO correct answers (wine goes towards their staff christmas party).

Yea - the fast moving rock is still cold. The atoms/molecules in that rock will be moving/vibrating slowly relative to each other because space is cold. The rock as a system may move fast - but it's internal energy is low as npts2020 said.

My dentist reckons that the best pain killer for tooth ache is a cocktail of codiene and i-buprofen. I wonder if this would work for ear ache as well? I really rate i-buprofen as an analgesic - I used to be very sceptical about the effectiveness of painkillers (as a kid we were given disprin and paracetemal etc.. and they were rubbish) - but this new fangled i-buprofen is amazing!! no drowsiness and you can drink alcohol (and take codine). Best thing for back ache ever. Miracle!!

Have you heard of Taguchi analysis? Not always popular as it can be a bit vague, but gives an indication of what variables are connected and are most prominent when optimising a system. You can then narrow down your experiments for further optimisation concentrating on the most prominent parameters. It allows many parameters to be varied at once and the results are put into a table and relationships are drawn. As I said - these relationships can then be looked at closer in a more traditional way. Hope this helps.

This is probably wrong, but at first glance, as x goes to 0 then sinx = sin0 = 0. so x^0 = 1. (as far as Im aware - even 0^0 = 1 no?)

Here is last fridays - 12 bottles of wine at stake!

Pretty much yes. It means the x AND the -y both get multiplyed by the 3 (the factor 3 is distributed through each term in the brackets) and the 2y and the - x get multiplied by the 5 (the factor 5 is distributed through that set of brackets). Therefore it expands to: 3x - 3y -10y + 5x (care with the PLUS 5x.... - x -)

IPA, Acetone or THF?

Well - he hasn't responded for a couple of weeks:eek:! I wonder if he's alright - otherwise we might here about him in the Darwin awards next year.

The 3 would come up if there were brackets around the 3z. i.e. [3z]^-4 meaning the 3 and the z are to the power of -4. But the way you have it the 3 stays on the bottom. i.e. 3z^-4 means that the z only is raised to the power of -4 and the 3 is just what it is. EDIT: Whoops - sorry - you beat me to it.

Well of course! If you don't think these things through properly then they'd never get off the ground.

OK - Thanks for your comments and ideas. I thought this would be the case. I think I'm looking for something that doesn't exist - I want to be able pass a brominated hydrocarbon (12-15 chains long) over/through some kind of column or catalytic converter type thingy and return it to standard kerosene without too much fuss. I'm not sure if this is possible with the ease I am after.

ditto - I didn't really like that terminology - interesting read though.

Hi, if you have a brominated hydrocarbon - how easy/what can you do to de-brominate this (back to the hydrocarbon)? Can this be done via some sort of ion exchange column? Cheers, P.