 Hi everybody, well everybody, welcome back. I know a lot of you have been with us throughout the day and it has been a spectacular super science shenanigans all day long and we have one last shenanigan if you will. This is this is the traditional event with which we close Super Science Saturday just about every year. Now I'm going to pass it along to our friends out at our Mesa lab Fountain Plaza in just a second but I do want to say thanks to all of you for joining us today. If you've known us for years you know that usually this is an in-person event and we did it virtually last year and this year because we want to stay safe with everything that's happening out there. We do hope eventually to be able to welcome everybody back up here and yet we'll keep doing some of this virtually as well because it gives us a chance to connect with people all over the place. So thanks to everybody for joining us today. Once we hand it off to our Wizards for the ping-pong ball launch that's going to be our grand finale. We won't be coming back to you after that but in the meantime as you watch and listen if you have any last-minute questions about what you're hearing as Jeff explains to you what's going to happen feel free to enter them in the chat or the Q&A and we'll share those questions before the big final event. Other than that I'm going to pass it off to Jeff and say thanks everybody. Oh my gosh am I in we're here we're actually here everybody welcome to the finale we're about to launch some ping-pong balls up in the air because that's what we do and we're also this year we have a surprise band we're going to play some music to you and have some fun and if you haven't been I haven't seen this before you need to get ready the whole setup is behind me and the band's back there too I'm going to throw it over to Jeff what's about to happen Jeff. Hey thanks Tim and welcome to our thousands of viewers on the internet today. Today we're going to be doing the ping-pong ball explosion and what we use for this is liquid nitrogen now I'm going to take off my wizard cap and put on my protected cover so we can practice proper science in here is liquid nitrogen it is minus 320 degrees Fahrenheit in its liquid form now when it goes from liquid to gas it expands 1000 times its volume now the trick is how do we contain that we have a beautiful two liter bottle we're pour liquid nitrogen until it's about half full we replace that into this 55 gallon drum the really cool part is then we put in 2000 ping-pong balls on top of it and then we wait and as the liquid changes phase and goes to gas and expands 1000 times this bottle can't take it and it explodes and these ping-pong balls should go as tall as those towers this is a great thing this is our favorite thing on Super Science Saturday I'm totally excited to do this are we ready to go we have a question are we are you gonna put a lid on that are you gonna you're gonna put it in there tighter a little bit it has to be completely airtight so it can keep the pressure inside the bottle that's a great question I will reseal this bottle that's completely sealed so that the pressure will build up inside this two liter bottle all right so we're about ready unless there's any questions from any of you out there and we really enjoy this so this is not actually work it's kind of fun and just so you know we spent a long time in development for this and got lots of advice and our safety people are here to make sure that we're doing everything in the most appropriate way to keep us ourselves safe and everyone around safe and the equipment is in good shape and yeah we also have Jeff we have this is Jeff squared so Jeff come in in here this is Jeff Dindall so he's actually gonna be helping me dump balls inside and once we are full then we'll go ahead and launch him any questions yet from those thousands of people out there listening any questions all right seeing no questions on with the show all right it's totally transpicuous she knows about what's about to happen so let's get it done and while we're doing this whole process we have a song for you a specific song that's all sciency from Zeus and the Zeus ads enjoy happy super science Saturday special number that number is pie pie control circles and spears and there's a lot of those in the natural world so you're going to hear the digits of pie and you're going to hear a couple of formulas surface area cross-section volume things like that i'll start the song as soon as our wizards step away set the circle you're confusing you're all round and out like a square thing i tried to multiply by four but it was too high and then i found the magical number five but your number the area works out fine circle change your number three point one four one five nine eight three point one four three point one four calculations easy so don't be scared well surface area is by our square the number y is used in geography fingers volume is four thirds by our three there and i got your number