Gage Block Wringing - Why?
Why Physics Stack Exchange recommends it
Physics Stack Exchange users link it as a quick visual demonstration of gauge block wringing when discussing why very smooth solid surfaces stick together through molecular attraction or vacuum effects.
Recommended by 0 people across 0 different months, 2018 to 2022.
What it is
A two-minute explainer from Young Solutions, Inc. showing how two very flat, smooth pieces of nonmagnetic metal (gauge blocks) stick together when pushed and slid in a special way, called wringing. It demonstrates the effect and walks through the proposed reasons behind it.
What people said
Cites V.F. · 2018-10 · Physics Stack Exchange · on “Perfect Vacuum Beneath an Object”
Even though real objects cannot be perfectly flat, they could be flat enough to stick together pretty well. Common examples are two pieces of glass or gauge blocks wrung together ( video [this video] ). Besides vacuum action, other forces, like molecular attraction (adhesion) may play a significant role.
Cites Cleonis · 2021-04 · Physics Stack Exchange · on “When I put my hand on a hot solid why don't the particles transfering heat to my hand exert a force on it?”
About the design of how stackexchange operates: the design is to not be a platform for threaded conversation. Using the comment section for threaded conversation is unpractical. If you favor opportunity to ask follow-up questions a forum with threaded conversation is better for you. That is why I'm not going into your follow-up questions. About forces between solids: you may be interested to learn about the fact that the very, very smooth surfaces of gauge blocks tend to stick together when they are brought within molecular distance to each other [this video]
Cites MatterGauge · 2022-04 · Physics Stack Exchange · on “How does the wringing of gauge blocks make them stick together?”
I was surprised to learn about gauge blocks and how you stick them together. The blocks have very smooth surfaces and still they stick by wringing ( [this video] ). One speaks of molecular binding (van der Waals?), vacuum and air pressure (even Casimir effect, which I doubt), oily stuff, or maybe other things. There is no magnetism involved. I can't imagine a vacuum is induced by wringing. It's a curious case. What happens?