Questions tagged [adhesion]

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2answers
4k views

Any solutions to Veritasium's hydrodynamic levitation?

So this Youtube video has been around for a while now Veritasium Hydrodynamic levitation! . Also these questions Fluid Mechanics explanation of an object levitated next to an air jet and Explain ...
4
votes
1answer
179 views

How to determine adhesive forces between fluid and a surface?

Disclaimer: I work in applied math and have limited background in Physics. Need a bit of help here. Assuming I have a 2D droplet attached to some surface like so: This droplet is also experiencing ...
5
votes
2answers
2k views

What makes a material adhesive (or sticky)?

I currently have a bandage on my arm that isn't sticking to me but definitely sticks to itself. It brought up the question: What makes a material sticky? What's happening on the molecular level? Why ...
2
votes
1answer
739 views

Meniscus in U-shaped capillary?

What does the meniscus look like for a U-shaped capillary? From similar questions, I learned that the total height (labeled as h) reached by the water in the un-bent capillary is less than the total ...
6
votes
1answer
787 views

How does glue work on the atomic level?

Glue seems to hold together almost all solid things. But on the atomic level, if two things have the same charge they tend to repel. So is it possible to charge glue and a solid with a charge? And ...
5
votes
2answers
1k views

Why is Sticking to Glass a Lower Energy State for Water?

I've recently been seeing a lot of questions about why, when water is poured from a cup, some will dribble down the side. The best answer I've seen so far is that water is in a lower energy state when ...
3
votes
1answer
605 views

Why don't we include the adhesive and cohesive force while calculating rise in a capillary tube?

The contact angle of a liquid solid interface is explained by saying that the liquid surface must be perpendicular to the resultant of adhesive cohesive and gravitational forces acting on it, since it ...
2
votes
2answers
811 views

Adhesion vs Static Friction

I feel like this question should have a simple answer, but I haven't been able to find one anywhere. I hope someone can help: In short, my question is why the force of static friction is so much ...