FreeBeard
@FreeBeard@slrpnk.net
- Comment on My ravioli bowl won't unstick. Took about an hour of prying, and still I couldn't unstick the plate. 2 weeks ago:
These are 50 cm wide half spheres. If you find that comparable to the situation in the picture your appetite must be enormous.
- Comment on My ravioli bowl won't unstick. Took about an hour of prying, and still I couldn't unstick the plate. 3 weeks ago:
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.
- Comment on My ravioli bowl won't unstick. Took about an hour of prying, and still I couldn't unstick the plate. 3 weeks ago:
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.
- Comment on My ravioli bowl won't unstick. Took about an hour of prying, and still I couldn't unstick the plate. 3 weeks ago:
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.
- Comment on My ravioli bowl won't unstick. Took about an hour of prying, and still I couldn't unstick the plate. 3 weeks ago:
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.
- Comment on My ravioli bowl won't unstick. Took about an hour of prying, and still I couldn't unstick the plate. 3 weeks ago:
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.
- Comment on How do you pronounce "centaur" and why? 4 weeks ago:
- Comment on Virgin Physicists 4 weeks ago:
I’m a physicist. If you are an engineer that sounds like a “you” problem.
- Comment on Anon is Turkish 5 weeks ago:
The German word for this bird is “Pute”. I guess it’s called after the French.
- Comment on Happens every time 1 month ago:
The normal lead we know but still special. Is the last stable element in the PSE and there is the theory that it’s actually radioactive (unstable) but the decay is so slow that we probably never see a single atom of it decaying.
- Comment on Late 1900s 1 month ago:
I always wondered what would happen if you cite an original source of something we consider common sense now. What would nature say if you use conservation of momentum and cite Isaac Newton and the Principia Mathematica.
What if you quote something in latin. For most of science history this was completely normal.
- Comment on Guga experiment 3 months ago:
If your rigor cortis lasts for more than 2 hours please consolidate a doctor.
- Comment on A popcorn bucket with 3 holes, to share with friends 6 months ago:
It’s the Sound they make and a phenomenon called Sand liquification . Basically it means that Vibrations and Air turn Sand in a liquid like state.
