All Questions
Tagged with adhesion surface-tension
26
questions
12
votes
4
answers
4k
views
How does a snake climb the wall?
Consider a snake climbing up the wall or ant climbing up the wall, which force is responsible for it?
An obvious answer is frictional force but my question is that if there is a normal reaction ...
- 151
1
vote
1
answer
100
views
Gravity vs adhesion of a water droplet
How much volume can a water droplet that is attached to a vertical glass surface have before it begins to roll downwards?
- 195
2
votes
1
answer
59
views
Water traveling on a letter in a water feature
Difficult for me to ask as I'm not a physicist.
Assume you have a water feature in the form of a waterfall where the water runs down a wall. On this wall, there are letters attached by a raised ...
- 133
4
votes
2
answers
131
views
Strange occurrence of glue drying
What happened here? I by accident spilled super glue and formed these amazing ridge patterns. Any ideas what caused this to happen?
- 41
3
votes
2
answers
132
views
Why do wet napkins stick to mirrors or glass?
Take a dry piece of napkin & put it against a mirror ==> it falls down.
Dab it in water, oil, or alcohol ==> it now sticks / adheres to the mirror.
How can we explain this in physics terms? ...
- 196
3
votes
0
answers
49
views
How does a plate stick to a tablemat?
So at my dinner table, I witness this weird phenomenon almost everday.
A wet plate if placed on the table mat sticks to it(works better if the plate is made up of steel).
I account surface tension and ...
- 229
1
vote
0
answers
670
views
What makes silicone sticky?
I've read from 3M's Adhesion Science articles and this StackExchange question that there are three types of adhesion: chemical, physical, and electrostatic.
I'm curious about what makes silicone ...
- 11
0
votes
1
answer
37
views
Why I require more force to slide covered notebooks over each other with water between them although water work as lubricant?
We have learnt when floor is wet we get slip as it reduce friction and work as an lubricant.
But yesterday I take 2 notebooks which are covered by transparent sheet , than I pour little water on one ...
1
vote
1
answer
61
views
Max allowed size of the pores that would prevent a viscous fluid to pass through
Let us have the following system where we put a viscous fluid from the upper inlet and we want this fluid NOT to enter the lower chamber thanks to adhesion & cohesive forces.
What is the max. ...
- 2,283
1
vote
1
answer
677
views
Why does water follow the spoon's surface?
Why does water follow the spoon's surface?
Is the reason surface tension, viscosity effects, a pressure gradient?
- 613
2
votes
1
answer
370
views
What forces act on a droplets hanging from surfaces?
What are the different forces acting on a hanging water droplet (tension of the droplet itself, surface adhesive forces, meniscus formation, etc)? What is the direction of each force, and how does ...
1
vote
1
answer
31
views
What is the change if a droplet of water is added to another droplet of water on a flat surface
There is a tiny droplet of water lying on a flat clean surface and I add a droplet of water to the tiny droplet on the surface. How can I explain the change that might occur?
- 11
2
votes
0
answers
1k
views
Why don't these water droplets fall? Is it because of the surface tension of the water?
Why don't these water droplets fall? Is it because of the surface tension of water?
Under the action of gravity, water tends to fall, so the pressure at the top of the water droplet is lower than ...
- 2,040
5
votes
1
answer
564
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 ...
- 103
6
votes
0
answers
849
views
When does water decrease or increase friction?
Water often acts as a lubricant e.g. a wet floor or road, but sometimes the reverse happens e.g. putting on wet clothes. I understand that surface tension is involved e.g. microscope slides sticking ...
- 1,879