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.
That really sucks.
an hour of prying
After that much work you should leave is as-is on your coffee table as an art/conversation piece.
No one is going to mention that OP has a bowl specifically for ravioli?
I think it’s just a bowl currently full of ravioli
No issues with either one of these options tbh
Well how do you cook ravioli? In your fettuccine bowl?
Pour it onto a dish rag and microwave it? I thought this was common knowledge?
Hot air cooled, contracted, and created partial vacuum is my guess. Make it hot again and it will unstick, I bet.
I was gonna suggest just running hot tap water over it for a few minutes until the air inside expanded enough.
Or chuck it in the freezer!
And shrink the air more?
No, but the items will get slightly smaller, eventually making an air gap you geniuses.
You do this with crankshafts for example, to get the bearings off so I’m not pulling stuff out of my behind.
Yeah but those are different alloys with different thermal expansion and a significantly larger temperature differential and a friction fit, this is a vacuum issue
Seems OP sorted it out without your help so yeah …
Yeah, everyone knows that ceramic has more thermal reactivity than air, so the plate will slide right off /s
Cool one slightly while warming the other.
No, warm the whole thing to heat the air inside
The McDLT solution
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.
By “ravioli bowl,” do you mean it currently has ravioli in it? If so, put it in the microwave for increments of like 30 seconds.
Pick which one to save and which one to sacrifice. Smash the sacrifice with a hammer to free the other, break them both and realize this is just so like you and every single thing you try to do starts with a half baked plan, then goes off the rails and ruins everything until you’ve nothing to do but pick up the pieces.
I’m the kind of person who reads step 1, does it, and then goes on to read step 2. I’m happy I’m not OP.
The mildlyinfuriating part is that OP hasn’t posted a resolution.
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.
it’s a bowl, it’s like trying to pick up a gold bar, how are you meant to get ANY leverage on it without using a knife or something?
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
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.
yeah it’s probably electromagnetic force holding it on there or something
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.
OP you monster, we need resolution.
Hey, if you’re using the hot bowl trick, make sure you pay attention to it; if you leave it to get hot and forget, it will be even harder to unstick it because the escaping hot air inside will make a partial vacuum when it cools down.
were you able to free the raviolis
congrats you now have an elevated plate
Assuming its empty, i would take the grog oggah boogah solution of smash the blue plastic bowl down the edge of your countertop. Something will give sometime.
Otherwise, did you try twisting the bowl one direction and the plate the other? Torque is typically a more effective force than pulling for friction.
