Update: it took time. And then a quick pry with a knife. Saved the dishes. Ravioli saved too but for raccoons outside probably lol. What I learned about physics…sheesh.
did you melt it?
were you able to free the raviolis
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Well it already got cold, hence the sticking together in the first place. All they need to do is get it hot again.
Put the whole thing in a pot of water and start bringing it to a slow simmer. This will warm the air inside, expanding it and breaking the suction. I got my stuck blender jar open this way, taking it out as soon as the first tiny bubble escaped and quickly unscrewing it before it could cool.
Reminds me of when I tried doing some cocktails with a boston shaker (two metal tins). It’s pretty easy to get those stuck - since metal bends it’s probably easier to get then unstuck than a ceramic bowl, but the cocktail is probably ruined after you have been trying to get the tins unstuck for a couple of minutes. Plus the potential spillage.
I don’t know if you did that, but for anybody struggling with those:
You’re supposed to put them together at an angle, so that the outer wall of the tins forms one straight line from top to bottom. Like this:
To open it you take them into one hand, hold them on the side where they form the straight line. Then take your other hand and gently smack against the part where the both tins connect with your palm
Here:
Since tin tins are hard to break (though not impossible I can tell from experience) you could also use a hard surface and more force if needed.
If they’re still stuck, let some warm water run on where they connect and try again. Although the drink might get watery if you take too much time.
Yeah, I did those. What helped me was using very little pressure when putting the tins together, barely enough to create a seal. Some guides suggest pushing them together with a smack to create a seal, which is rather counterproductive when your issue is not being able to open it quickly.
Oh yeah, if you use them often enough you’ll get a feel for how much pressure you can use, I’m comfortable with using a little smack to close them, but I used to work in a cocktail bar, so I have some experience with them.
I’m gonna need an update when OP does the hot bowl trick, I wanna know if it worked
I pryed it open with a knife. Eventually. And wasted the ravioli.
The power of suction is physically limited. That means it either isn’t suction or op is crazy weak. My guess is that the plastic melted (probably not from boiling Temp) or op is strongly exaggerating.
Air pressure is insanely high compared to a vacuum
The pressure acts over the area of contact. For a perfect vacuum it would lead to ~1kN of force. This is the same order of magnitude our muscles produce. If you take into account that the vacuum results from cooling over such a small temperature interval the force can’t be too high.
1kN is equivalent to lifting 100kg… 220lb for our imperial friends… I don’t think I could put that much force on a plate and bowl I was trying not to break
Your grip on a smooth plastic surface nearly parallel to the force vector you wish to apply is tiny, you cannot exert 1kN in this situation.
Got on to scroll on the clock , wasnt dissapointed
yeah it’s probably electromagnetic force holding it on there or something
It’s God.
Could god microwave a ravioli bowl so hot even he couldn’t pry the plate off the top?
How can an ace be one and eleven? What kind of god would do that?
That stuck bowl of ravioli is slowly forming the next dominant species.
Take that Christians
That bowl and plate are all that keep this reality going
How do you figure suction is very limited? You’ve never tried to pull a suction cup straight off, have you? I’m not talking about when suction cups have bad sealing surfaces and slowly leak to the point of popping off or peeling suction cups off from a corner, I’m talking applying it to a good surface and then yanking it.
A shoddy 4.5" suction cup from Harbor Freight is rated at 80lbs carrying capacity for glass, which happens to likely be the same material as the dish (corelle), judging form the thinness. The bowl is probably plastic and had weight on it while these were hot and wet after washing. Please, let me know if you can lift an 80lb dumbell from the end with a single hand with ease.
The difference between ambient pressure and inner pressure is always smaller than ambient pressure. Delta p is therefore limited. The force comes from Delta p times contact area which is constant.
I sadly don’t know your units of mass but as I said a perfect vacuum over an area such as the Bowl is as strong as a muscle. The Ravioli will in no world produce a strong vacuum so muscle will win in most cases.
Here, I’ll do metric for you on your theory of muscle being equivalent perfect vacuum. I have some similar corelle dishes. The flat measures 10cm across. That’s 78. 5cm^2 area. Assuming OP lives at sea level, 1atm is 1.033kg/cm^2 which puts the total force at over 81kg. This bowl offers no horizontal surfaces to hook fingers under to utilize geometric advantages and is instead entirely dependent on friciton. If your fingertips can squeeze sideways with enough force to pull a smooth, tapered 81kg object without glue, there’s a gold bar in a Dubai mall with your name on it.
4 inches diameter, 12.6in^2, 180lbs for the Americans.
At some point between 0 and 81kg of force, I’d start worrying about breaking the plate with such little support around the rim. And, as for the impossibility of a perfect vacuum, I’d be easily convinced the bowl could have more than half of the maximum possible pressure differential. A large portion of the interior volume is probably ravioli, minimizing the gas volume. Ravioli are full of water, which means the remainder of gaseous volume in the bowl was probably mostly steam, pushing out the standard air. Steam has an insane compression ratio as it cools and condenses back into water, at about 1700:1. Go watch the video of a tank car imploding from steam condensation.
I cover my bowls the same way. I always cock the plate to the side for this exact reason. My 1L (4 cup) pyrex bowls with silicone lids can cave 1" if they’re allowed to cool for a minute. Steam easily vents from the rim as it’s produced but once it starts cooling, the weight of the lid or plate is plenty to get the initial seal
@FreeBeard separates evacuated Magdeburger hemispheres by hand.
/s
These are 50 cm wide half spheres. If you find that comparable to the situation in the picture your appetite must be enormous.
Rough guess works be 20cm diameter, so 16% of the force required.
And as opposed to the Magdebutger hemispheres, these objects don’t come with handles for good grip.
The power of suction is physically limited.
Someone has never heard of Delta P.
The delta P you’re talking about has much much higher ambient pressure than what is the case here.
And even underwater there is a limit to delta P.
It’s delta p and not fraction p. The difference between ambient pressure and inner pressure (at least zero) is always smaller than ambient pressure. Delta p is therefore limited.
OK and? A difference of just 2 psi means that a bowl with diameter 4 in. (complete guess) is being held in place with ((4*π)=12.56*2)= 25 lbs of force distributed evenly across the surface of the plate.
A bigger bowl or greater suction changes these numbers dramatically. 2 psi on a 6 in. bowl is held in place with 37 lbs of force. 4 psi on a 6 in. bowl is held in place with 75 lbs of force.
Sure its “limited” in that there can only be a 14.7 pressure difference, but that doesn’t mean anything in terms of “this is really hard to undo”.
And if there’s oil or food or something sealing the gap between bowl and plate preventing the pressure from equalizing… fugheddaboudit.
I sadly don’t understand these units and your point is drained in it. The point I want to make is that the “force” of vacuum is limited by the difference of pressures.
You say it changes “drasticly” with area or suction but that is untrue. It changes linearly with area (not drastically) and pressure difference has a maximum. The maximum is defined by the pressure of the vacuum(=0) and the pressure of the ambient air (1 arm). Both are constant so the maximum is constant and actually not that big.
I could change all the units to potatoes and wombats and my point would still be valid. You are being intentionally obtuse to avoid admitting you’re wrong.
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an hour of prying
After that much work you should leave is as-is on your coffee table as an art/conversation piece.
Like, a bowl is stuck to a plate?
Put the bowl in warm water, put ice on the plate. It’ll release within a few minutes
Heat it to make the air expand
You got a fancy hat now
That really sucks.
That bottom bowl looks plastic, just push on the side gently to try and break the seal around the other dish.
The mildlyinfuriating part is that OP hasn’t posted a resolution.
