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38 | ATMOSPHERE vs VACUUM • Ups . . .
See the Happy End . . .goo.gl/0JJjc
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Aaron A
 
Vacuum suction . . . . thats y its pulled downwards . . . .
 
I assume, when they let the air pass into the container which has vacuum, the force of air (environment) crushes it. Is it?
Tim Box
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I presume it was deliberate or had some one forgotten to open the valve at the top?
 
Atmosphere won ofcourse. But the dual was between Atmosphere and the vessel wall, not with vacuum.
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That is one of the most awesome things I have ever seen! Thanks for posting.
 
Small correction +Gaurav Butola;
they let the air pass out of,
hence the pressure inside the container (the pressure acting on the inner surface of the tank) is reduced to less than the pressure acting on the outer surface of the tank.

With your reference to "the force of air";
The atmospheric pressure multiplied by the outside area equals the force acting on the container from the outside, and it is greater than the vacuumed pressure multiplied by the inside area which is the force acting from the inside.

This is similar to what happens to a balloon if you left it in the fridge, however the pressure reduction in the latter case is due to temperature decrease. (actually the balloon is a closed system and the tank above is an open system, which is ESSENTIALLY different..but don't bother yourself with that)
 
This is what happens to a submarine without positive pressure inside it; The pressurization prevents the very high pressure of water at these depths from crushing the submarine.
An airplane features positive pressure too but the reason is not the same; at high altitudes pressure is very low and people cannot normally breath. That's why in movies when an airplane's door is opened or its body gets pierced people and stuff fly out of it!! going from higher to lower pressure, or in other words forced out.
 
here too, no dark matter !
 
Implode or explode..that's the question.
Black hole or Nebula,
Earthquakes or Vulcano eruptions,vs meteorite astroid shower
and the list can go on...

Really no paradoxal issue 4 me,to explain....
 
What most likely happened here is someone washed out the inside of the container with hot water, then sealed it off without allowing it to dry first.

Hot air has lower relative pressure than the cool air outside it, so it was only a matter of time before this happened.

You can do the same thing with a soda can and a bowl of cold water. Boil some water in the soda can until it's all vaporized, then upturn the can into the cold water and it'll do something similar to this.
 
SWEEEETTT!!!! That happened at a Fueling Depot near me a few years ago. Only saw the tank after it happened, like a crushed soda can. Thanks very much for sharing.
 
+Matti Minnick
What you are describing is "buckling" or "bulging" of a very thin wall due to the difference between expansion on its hot inner surface and compression on its cold outer surface.

Concerning your aforementioned statement:
"Hot air has lower relative pressure than the cool air outside"
As far as my rusty memory tells me, Relative means "with respect to sea-level atmospheric pressure", so, if this tank is at sea level, the cold pressure outside has a relative pressure of zero and the hot pressure inside has a relative pressure of a given positive value because pressure is directly proportional with temperature and your theory suggests that the tank's interior is hot.
So, if your theory is actually the case, the tank should rather explode not implode.

However, you tackled quite a good point by what you mentioned about relative pressure, because the type of gas inside the tank and its consequent pressure level indeed has got a lion's share of influence.
I mean that maybe when the tank got crushed like that it wasn't at all empty, but the accident was subject to the type of gas and its temperature which might have been too cold relative to the ambient temperature..let alone the gas type's heat capacity and the insulation quality of the tank..and I'm getting far too distracted..and cheers :D
 
Look up BLEVE for the opposite effect. Also I've seen the results of draining those gigantic petroleum storage tanks with the vent clogged. Basically the same thing except in 40ft tall scale.
 
Conclusive of all above comments , huge tanks are provided with what is so called rupture discs, two or more are provided at high point of the tank in addition to vent pipe on top , this is for liquid substances , for gas products only rupture discs are fixed , during filling pressure will rise with respect to atmospheric pressure , thus if tank may explode from inside out , in this case rupture occured from negative pressure within the tank after emptying the gaseous product , when a rupture disc is installed it will rupture and thus keep the tank shell in tact , a new rupture disc is required otherwise the tanc will be atmospheric.
 
No! I would believe this if the vessel is made from plastic or something soft. Maximum PSI is about 14 and would happen very quickly so long as its sealed proper... as vacuum increases molecules are pulled out. A vessel that large would need an incredible molecular pump in order to achieve any amount of great vacuum. Even approaching the vacuum level of space... still 14 PSI...
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Жесть, а что ж такое произошло то?
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