Supercritical fluids
Why Physics Stack Exchange recommends it
Physics Stack Exchange users link it as a vivid lab demonstration of the liquid-gas critical point and supercritical fluids when answering questions about phase transitions.
Recommended by 1 people across 1 different months, 2011 to 2020.
What it is
A short 2008 demonstration by Professor Martyn Poliakoff at the University of Nottingham, shown in his office, of what a supercritical fluid looks like. It shows carbon dioxide passing through its critical point, where the boundary between liquid and gas disappears.
What people said
Recommends CuriousOne · 2016-06 · Physics Stack Exchange · on “Ultra-cold gas giant atmospheres”
The interiors of many gas giants are already most likely condensed into a metallic phase of hydrogen and above that there is a supercritical layer in which there is no difference between gas and liquid phase. The transition between the two phases around the critical point is quite amazing, which can be demonstrated in the lab with carbon dioxide: [this video] [LINK] I find this to be one of "coolest" experiments in all of physics. One can only imagine what it looks like at the scale of weather systems the size of earth!
Cites Marek · 2011-08 · Physics Stack Exchange · on “Embrace Physics”
Well, I can tell you what got me into physics. Already at high school I have been fascinated by quantum theory, general relativity and string theory (mostly thanks to Hawking's popular books) and this hasn't gone away. One might argue that these three huge areas is already all there is to theoretical physics but only at the university did I discover fascinating subject of statistical physics and condensed matter theory which should certainly also been mentioned (of course, there are great many other areas; by not mentioning them I certainly do not imply they are not important or interesting). Now, so much for general talk, let's look at some concrete stuff. Nature of the space-time and gravi
Cites Archisman Panigrahi · 2020-10 · Physics Stack Exchange · on “What happens physically in a second-order liquid-gas phase transition?”
Thanks for mentioning the demonstration. I found this [this video] . Due to the pandemic, I cannot return to our university to try it out myself.