All Questions
Tagged with water surface-tension
113
questions
-1
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2
answers
103
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Why rain drops are spherical while water droplets on a glass surface are flat?
Why are raindrops spherical when falling through the air, but lose their spherical shape when they are on a flat surface?
5
votes
0
answers
121
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How do bubbles on water surface merge?
When we open a tap over a water surface, we get to see a lot of bubbles ("half merged in the water") coming out on the surface.
Now what I saw was that two such nearby half bubbles merge to ...
- 8,220
1
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0
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25
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Best mesh design for a tea strainer [closed]
I'm currently designing a closed tea strainer / egg made of stainless steel and testing a prototype made of polycarbonate plastic. The problem I'm facing likely has to do with the capillary effect - ...
- 195
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2
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136
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Why does curvature reduce the inward attractive force of molecules?
This question concerns the first 2 paragraphs of this text.
I am struggling to visualize why molecules on the flat surface experience more net inward force than those on a curved surface. If we have 2 ...
1
vote
2
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200
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Why do hot water droplets persist in cooler water?
I notice this phenomenon typically when mixing hot or warm water with cold water. Basically, tiny droplets of hot water travel inside the body of cooler water and persist. I have included a photo of ...
- 71
10
votes
2
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487
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Could a fish swim out of a sphere of water in a zero-gravity environment?
Can a fish swim out of a sphere of water in a zero-gravity environment?
I am going to state some assumptions.
We assume the sphere of water is not affected by any thermal properties of its zero-...
- 343
0
votes
0
answers
35
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Shape of a static capillary surface
I am studying the effects of surface tension and in particular the shape of a capillary interface in hydrostatic condition.
Let's recall the Young-Laplace Equation
$ \Delta P = \sigma \bigg(\frac{1}{...
- 1
8
votes
2
answers
795
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How would the volume of a drop of water (from a dropper) on the Moon and other bodies compare to one on Earth? (indoors of course!)
Searching for "volume of a drop of water from an eyedropper", I ran across this answer on Quora:
It depends on the size of the dispensing tip, but generally for a Pasteur pipette it is ...
- 6,273
1
vote
1
answer
100
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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
7
votes
2
answers
271
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Breaking apart the surface tension of a water droplet
How far apart do two vertical glass surfaces have to stand for a water droplet that is sticking to both of them to break into two?
I apologize in advance for the question possibly being too imprecise �...
- 195
3
votes
1
answer
74
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Why does water come out of a bottle in waves?
So imagine you have a bottle of water or any type of liquid (like a bottle of milk that has just been opened)that is completely full or even three quarter of it is full,why does the water or milk come ...
- 31
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vote
0
answers
41
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How does the size of a water drop varies between materials?
Say you have rising steam forming water on some surface and when the water accumulates, it forms a drop that falls because of (I suppose? Not sure) Mass exceeding the force of surface tension.
Does ...
- 285
2
votes
1
answer
59
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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
1
answer
67
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Asymmetrical meniscus in certain glassware
I work in a lab that does tests on water samples, and one test we do measures COD or Chemical Oxygen Demand. For quality control, we have a COD standard which contains a certain amount of Potassium ...
- 41
5
votes
2
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562
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What is the name of the physics concept where water runs back under the edge of the roofing? Is it just surface tension?
I work as an apprentice roofer and I'm interested in the why of things. Nobody I have asked can confidently answer this question so here I am.
This diagram shows the phenomenon:
The image is from ...
