hi I'm Diana last week I made a video with five of my favorite physics tricks and promised that I would share the physics of those this week which I will deliver but what you didn't see in that video is that when you hear about these demos they sound so simple and so easy to set up but that was not our experience when we tried these out for the first time so if you only want the demos with simple directions a link to the shorter version is in the description so you can either try them yourself or if you've seen them before try them with the young people in your life but if you want all the physics stay tuned for this video with my friend Jabril here goes this episode is supported by Prudential do you think I can balance two forks uh-huh on the edge of this match on the edge of this glass know you really I'm staying firm on this one all right hmm taking some cheats huh well then doesn't work again never tried it before is this like the balancing bird I think that's the idea huh no no no yeah way so the forks balance because the center of mass or the average of where all the mass is on the fork sculpture is in a particular place objects topple over more easily if their center of mass is above an off center of the balance point in our case the forks hang down below the edge of the glass and forward a bit so they're balanced it's hard for an object to center of mass is already lower than the balance point to fall over the balance point as awesome second experiment or some water onto that plate okay we're gonna put a match now cover it nice oh wait did you see what happened I seen what happened the real question is do I comprehend what happened that's mad that's cool okay do you want to describe what you're seeing I think it's raising the water level yeah yeah what else is produced when you burn a match we got co2 we got heat heat heat yeah heat is produced so the heat from the flame speeds up the air molecules so they move around a lot more in the air expands as soon as you cover the flame there's not enough oxygen for the match to keep burning so it goes out and the air will immediately start to cool down contracting as it does and taking up less space this creates a lower pressure in side then outside the glass which forces the water up but that's not the whole story when you burn wood you produce some water vapor what's being converted from to make water what is largely made of cellulose combine that with oxygen and you get co2 and h2o now once the flame goes out the water vapor hits the sides of the glass and cools and some will condense into liquid form liquid water is 1,600 times more dense than water vapor and this contributes to the low pressure there are other reactions taking place that can affect the volume of gas before and after and it's possible some of the co2 can get absorbed into the water so overall it's not a simple process yes yeah Diana that was crazy what third experiment all right mmm okay who's gonna do something else oh that one flip it's pretty amazing my favorite party at this point we added some tap water to the carbonated water to dilute the amount of dissolved carbon dioxide okay so they stink oh yeah some of them sink oh yeah and it's coming back oh Claire we don't know I wonder if any will then we'll go back down oh so we are expecting the float there's a sink again oh I gave that away yeah so I think that we probably mean oh that is awesome that is so awesome I'm really glad you think it's cool because this is like 20 minutes later oh that's really cool why do you think we cants rise up to normal water they sink and obviously like some of them are sinking right now then what's happening oh oh the bubbles help them float to the top and then the bubbles eventually pop and they sink yes is that really it's cool yes that's incredible that's exactly what's going on so there's carbon dioxide dissolved in sparkling water once you open the cap and the pressure is released co2 gas bubbles start forming but they can't form everywhere they need a nucleation site a place like the rough surface of salted peanuts some champagne glasses have scratches itched in so when the glass is clean the scratch becomes a nucleation site for the bubbles to form creating perfect bubble lines it's like essentially generating like a raft on ya peanuts yeah number four go ahead and light it ready yes dang it that is interesting it what's interesting no folded the paper towel and we're gonna put a couple more matches Wow Wow whoa okay foster grab did not work we put some olive oil around here trying to make this seal better coming in hot okay oh yeah oh it lives yeah that is awesome so I was like we're gonna have to nix this one what do you think is happening here Jabril all right so it's creating that's that's suction from yeah the process yeah why it brings the plate along though because that's the closest hard surface it's basically what's in the way like just as with the water rising trick the air inside ends up with a lower pressure but the plate is blocking the opening so it stays low now the atmosphere always pushes with a constant pressure even below a plate so once the suction starts the air is pushing harder upward on the plate than the air on top is pushing downward so the plate can move up with the glass number five all right for this experiment I'm going to put a stake through a balloon gonna pop a balloon you think it'll pop it's gonna pop Oh even if it doesn't pop I still feel like wow how do you feel about that drill and different and different I feel very indifferent what I just poke the stake through this blue doing I could put it all the way through No ah I've never done this before I am never serious for first try I'm very annoyed Oh check that out I'm very impressed you want to try this real it's all you alright any tips yeah this tip ah damn I didn't work oh so you putting it through the bottom huh I am yeah why I believe that you went for the thicker part okay so yeah this little nubbin the tip of the balloon is a bit thicker like the rubbers a bit thicker so it's less likely to break and then become like a catastrophic rupture and then up over here you've got all this rubber coming together and so it doesn't get stretched as much so therefore it ends up being thicker despite the fact that this part is not right right right you can stake a balloon without popping it or or thanks for helping me with all these experiments too bro thanks for having me thanks for blowing my mind I know how to be the cool guy at parties now thank you guys for watching and as always happy physics see hey last thing Jabril has a