55 Gallon Drum Collapse

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55 Gallon Drum Collapse

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Harvard Natural Sciences Lecture Demonstrations

3 жыл бұрын

When the air inside a 55 gallon steel drum is pumped out, we see the weight of the atmosphere push inward with 101 kPa of pressure.
The top and bottom of the drum has a radius of about 30 centimeters, and it is about 1 meter tall. This means the atmosphere pushes down on the top of the drum with about 6,500 pounds of force! We leave the calculation of the force on the sides as an exercise to the student.
We pump on the drum with a Varian SD-200 vacuum pump. Usually the initial collapse will occur after a minute or two. The drum seen here actually underwent initial collapse after 35 seconds of pumping; the footage was edited to make it more watchable.
For more details on our setup, see sciencedemonst...

Пікірлер: 28

@technobird22 3 жыл бұрын

--> Warning to headphone users!

@mxcollin95 Жыл бұрын

So that’s what the Titan sub experienced…crazy. And that’s just with normal atmospheric pressure, how much faster, stronger and more violent would the implosion be under the millions of pounds of force acting on the total surface’s area of the submarine?

@DanielSMatthews 3 жыл бұрын

Neat, now put just enough liquid air in it for it to reinflate when you put the cap on and let it warm up.

@tolga24 3 жыл бұрын

I would love to see that as well.

@The-court-jester 2 жыл бұрын

This is the evolution of me going to bed and getting cold

@riven_personal 3 жыл бұрын

If there is no atmospheric pressure, what would happen

@dennisnebgen9049 Жыл бұрын

could you use a vacuum pump and pull the air out of the barrel to say 25 inches of mercury without it collapsing?

@PrinceofPwnage 7 ай бұрын

I work at a CNC shop, sometimes we use a 55 gal drum vacuum to suck up fluids or coolant, im always nervous of the drum exploding lol. Could it? We use the Exair Drum Vac High Lift Reversible

@riven_personal 3 жыл бұрын

I think we need more energy to pull out the air from drum than atmospheric pressure...

@kguy152000 3 жыл бұрын

It's always incredible to me how our human bodies (or any organisms) are resisting this much atmospheric pressure all the time, and that we don't just simply collapse.

@NatSciDemos 3 жыл бұрын

Luckily the insides of our bodies are not at vacuum, so the same pressure that's pushing inward is also pushing outward.

@MusicSoundPlayer 2 жыл бұрын

I was hoping you made a vacuum airship

@NicleT Жыл бұрын

I always thought these was 45 Gal.

@vdypw5853 3 жыл бұрын

😯🧐

@jojojorisjhjosef 3 жыл бұрын

weak drum, can't even take the 1 atm on his own.

@obreti.svobodu 3 жыл бұрын

И вот за это "учёные" получают деньги...

@emiliedejonghe1753 3 жыл бұрын

Pov your watching this cause your chemistry teacher made you.😅😂😛

@royalfolkspark 3 жыл бұрын

101 kPa of pressure. ????? How many pounds ????? What lbs started the collapse,? What lbs ended the collapse ?

@maxcompress9732 3 жыл бұрын

Even the plastic hose did not collapse. Hmm then, make me a device with that plastic :))))))

@JNET_Reloaded 3 жыл бұрын

Implode you mean!

@robertpitt8418 3 жыл бұрын

Earth

@tamaseduard5145 3 жыл бұрын

🙏👍🙏❤️🙏🤪🤫

@julianaimiranda164 5 ай бұрын

🔒👁️👁️imagino.... alguém com 📱 🧤 no carro... banheiro... reunião....em QQ lugar....se alimentando do bem de meu ❤.....sorrindo...se preparando com as armas do Papai do céu que habita em mim. Promessa: isto jamais nunca NEVER acabará mesmo lado a lado🙋‍♀️✅🪄🔋🔨⛓️⛓️✒️🖋️💌

@julianaimiranda164 5 ай бұрын

Serei seu vício preferido. Sua arma infalível. Sua droga preferida. Melhor iate que já 🔱 no seu 🪡📧R ♏📧⤴️🎯