Balloon in a Vacuum Chamber Science Demonstration

>> YOUR LINK HERE: ___ http://youtube.com/watch?v=N_eMGTmfZLY

Explainers Ian and Giancarlo, from NYSCI, perform the Balloon Vacuum Chamber Activity from our AirPlay demonstration. Do not try this at home! We have lots of special safety protocols and training here at NYSCI. • INTRO SEGMENT SOURCES • Music: • Wallpaper by Kevin MacLeod • Link: https://filmmusic.io/song/4604-wallpaper • License: https://filmmusic.io/standard-license • Visuals: Really Useful Media, www.usefulmedia.net • MAIN SEGMENT MUSIC SOURCES • Beauty Flow by Kevin MacLeod • Link: https://incompetech.filmmusic.io/song... • License: https://filmmusic.io/standard-license • • Son of a Rocket by Kevin MacLeod • Link: https://filmmusic.io/song/4391-son-of... • License: https://filmmusic.io/standard-license • • Script, Presenting, Air Chamber Diagrams: Ian and Giancarlo, NYSCI Explainers | • Science Trainer: Iboun | Video Editor: Kevin, NYSCI | Illustrations: Bec, NYSCI • EXPLAINERS AT THE NEW YORK HALL OF SCIENCE • Explainers are part of the Science Career Ladder (SCL) – the signature program of NYSCI’s Alan J. Friedman Center for the Development of Young Scientists. They perform science demonstrations and engage visitors in STEM conversations. • FOLLOW US! • Instagram: @ExplainerTV • Twitter: @Explainer_TV • Facebook: facebook.com/nysciexplainers • Web: nysci.org/learninglab/youth-development • TRANSCRIPT • Hello everyone! My name is Ian and I'm an Explainer • here at the New York Hall of Science. • Did you know that we actually live in a sea of something that's constantly all around us? • And without it, we probably wouldn't be able to hear each other right now… • Take a moment to think about what that might be. • I bet some of you out there are thinking about water, • since I said the word “sea”. • Actually, the sea that I'm talking about, is the air that's all around us. • You see, air is what is known as a fluid. • That means that it can freely move about • and it will fill and take the shape of any container you put it in. • Much like water. • To show off how this force works, my friend Giancarlo • has a little demonstration for you all. • Thanks Ian. • Hi, my name is Giancarlo, and I'm also an Explainer • here at the New York Hall of Science. • Now, let me give you a quick demonstration on how air pressure • affects some of the objects around us. • First, we need to know how strong this force is. • Air pressure is normally applied at about 15 pounds per square inch, • Meaning that if I have this rubber pad here with an area about hundred 21 square inches, • there should be about 1,800 pounds of pressure being applied on it. • But if there's that much pressure, • how am I able to lift up the rubber pad so easily? • Well, we have to remember that air applies pressure equally in all directions. • Because of this, the 1,800 pounds of pressure applied on the rubber pad is balanced out – • meaning that I'm able to lift it up and move it around easily. • Now, if air is applying all this pressure to everything and everyone it comes • in contact with… how come we don't feel this force pushing down on us every day? • There are two main reasons for this. • First! • We're all just used to it! We've lived on this Earth for hundreds and hundreds of years. • So our bodies have naturally adapted to earth's air pressure. • So it’s not as harmful to us anymore, and we’re able to move around normally. • The second reason, is that we have air and other fluids inside of us • that helps balance the external air pressure. • Every time you breathe in Air, you increase the air pressure. • This internal pressure is constantly pushing outwards • and helps balance the external pressure that is constantly pushing inwards. • This balance of forces from the inside and outside is known as equilibrium, • which allows us to keep our normal shape and size. • Now what do you think would happen if we could manipulate • the air pressure that was affecting an object? • Take, for instance, this balloon here. • Now, balloons are normally made up of rubber, • and rubber has a very interesting property to it known as elasticity. • This means that no matter how much I stretch, pull, or compress this balloon here. • It always wants to return to its normal shape and size. • Now, Ian's balloon is filled to the brim with air. • Meaning that the air pressure on the inside is constantly pushing outwards in all directions. • This causes the balloon to stretch and expand – • but we have to remember that there's air and air pressure on the outside of the balloon. • That's constantly pushing downwards on it in all directions. • This means that right now the balloon’s • current shape and size, it's at its equilibrium state. • Meaning that the pressure on the inside of the balloon is • balanced with the pressure on the outside. • Now what would happen if Ian were to remove some of the air that's surrounding the balloon? • Let's introduce a special tool that can help us with that scenario, shall we? • Introducing, our vacuum sealed chamber. • This device allows us to manipulate the air pressure that's around an object. • And observe what happens to it while inside the chamber.

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