Gilded

I'm currently expecting a rather large shipment from Svenskakemi. If it all gets through customs etc. without hassle I'll be very relieved. I'm surprised it hasn't been mentioned in this thread - it's a Europe based and rather quickly expanding company that provides quite a variety of quality pyrotechnics materials and quite a bit of other stuff too, if someone didn't already know (I think it has been discussed earlier too though).

Nothing beats a good implosion. Except a good explosion, perhaps. Anyway, nice clip.

Wow, nice! Interesting too, especially with that flare effect and all. Many of the other experiments are amazing too, great stuff in general. It's not every day you see experiments being done with relatively rare elements, praseodymium and rhenium to name a few. Something that would also be great to see (although they don't usually produce very flashy effects) are some very endothermic reactions - perhaps mix some barium hydroxide (octahydrate) and ammonium nitrate and stick a temperature probe somewhere in there. I've never seen this done and more endothermic reactions don't come to mind right now, but something along those lines would be nice to see.

Forgetting about Cherenkov radiation are we? Of course, c isn't broken by the object/particle, just the speed of light in a medium. See http://en.wikipedia.org/wiki/Cherenkov_radiation for more information.

I thought this was more of a chemosynthesis thing rather than heat? Some bacteria live in cold seeps where there is no "excess heat" as in from a vent, just the necessary chemicals.

Sure, with some sort of gas thrusting perhaps. Or solar sails.

Very nice, if not awesome. I've been thinking about filming various reactions myself too (on 60fps or similar, then converting to lower value for slow motion, especially for fast reactions), what sort of camera do you use?

I think I'm becoming one of those people who read lots about quantum mechanics etc. and doesn't really understand the basics too well and goes around asking silly questions. Anyway, zero point energy (of vacuum). If you assume that when the universe expands more space is created and a certain volume of space or vacuum contains a certain amount of ground state energy, then doesn't this increase the overall energy of the universe, seemingly "out of nowhere"?

I happen to own some pure palladium and it indeed is quite silvery and white so I can account for that also. I'd imagine some palladium alloys could look pretty much like gold though.

Does the Casimir effect fall under any of those four?

Does AP chemistry cover nuclear chemistry? A minor one (and preferably a safe one) on radiochemistry might be something you don't see every day. Although I'm not sure if the average high school chem storage has any suitable compounds.

Indeed. Probably not surprising to many, it's also possible to calculate the evaporation time if the mass is known. "So, for instance, a 1 second-lived black hole has a mass of 2.28 × 10^5 kg = 2.05 × 10^22 J = 5 × 10^6 megatons of TNT." (http://en.wikipedia.org/wiki/Hawking_radiation)

As I said, there can be a huge volume of gaseous end products without any heat generation from the reaction at all. I'd imagine if you stood right next to an (unconfined) large scale reaction of this sort you'd just be knocked back by the expanding gases.

Yeah, what Cap'n said. I'm quite sure the smacking thing was done with harnesses. It's very often digital these days when it comes to effects on actors/actresses themselves, which of course helps to save them from nasty bone fractures. Of course, even the harness stuff can be physically tough but at least they're not getting thrown by an actual shockwave against metal etc.

There are explosives that release surprisingly low amounts of heat from just the chemical reaction itself, still having gaseous end products of great volume (which leads to the shockwave effect). IIRC a good example is sodium azide which is used in airbags. However, in movies these invisible smack thingies are done with harnesses and digital editing almost without exception. Why are there "explosive reactions" that don't release much heat then? Think of a chemical system having two goals; lesser enthalpy and greater entropy. Sometimes it's "better" for the system to go for a massive increase of entropy at the cost of a small increment in enthalpy. These reactions are sometimes quite endothermic. Edit: Of course, when a small container is suddenly filled with loads of gas it doesn't really matter if the original reaction was endothermic, you'll end up with loads of heat due to the immense pressure anyway.

Happy holidays and hopefully a new year that will allow me to actually post on the forums (which is something I haven't done in a year or so).

Wow, quite awesome. I think they had pretty much that idea earlier but good to see it's been confirmed. Btw I liked the term "early universe-juice".

Wow, this addition is [math]\cf{SUPErB}[/math]. (A.k.a. sulfur-uranium-phosphorus-erbium-boron)

"But I strongly suspect that it is an imported version of the RGBco set" Yeah, the similarity is indeed disturbing. And wow, the huge lanthanide pieces at Smart Elements went unnoticed by me earlier. Although I am quite happy with my current lanthanide set (excluding promethium), I wouldn't mind a 200g block of lanthanum or cerium.

Hey btw collector, have you purchased any of your elements (or chemicals) from http://www.svenskakemi.nu, as it seems like a nice site. I thought about ordering from them too but the minimum amount for an order (excluding shipping) is 3000 SEK, over 300 euros (which is a little bit more I'm willing to spend at one time).

Haha, always with the engines YT. ) "Just remember that it did kill Marie Curie, although she did carry it around with her all the time." Yeah, but she had a gram of it. There probably isn't even a milligram of actual radium metal on radioluminescent watch hands. I'd recommend selling it too, for following reasons: A) You don't need it, right? B) I want it.

"eh. if you purchase HNO3, the government will watch you very closely" Heheh, indeed. If a purchase even can be done, an individual purchasing HNO3 for no apparent reason gets a Megasuspicious/Terrorist-stamp on his files in the government archive.

Mmm, halogens. Got myself iodine and bromine so far. Hey by the way jdurg, is it ok to put a bromine ampoule (most likely borosilicate) to -8 or so and then warm it in room temp without too much risk of it breaking? I thought about doing so but wasn't quite sure how safe it was.

Why did the dinosaur cross the road? - Chickens hadn't evolved yet. * Why did Mokele cross the road? - He went after the dinosaur.

Fight Club is quite good. (And that's about it, no more from Gilded this time.)