Questions tagged [water]
Two Hydrogen atoms covalently bonded to one Oxygen atom. One of the more common compounds on the surface of the earth.
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Chemistry of electrical conductivity of pure water
I understand the electrical conductivity of pure water is very low, but not zero, and is due to the slight number of H+ and OH- ions naturally present. I understand that they will move under the ...
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Time for which a drop stays in the leidenfrost point
Is there any way to find out the time required for a drop of given dimensions to vaporize after attaining Leidenfrost point?
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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 ...
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Why water heat capacity has minimum at body temperature?
Water heat capacity has the following plot:
One can see it has minimum near 40 degrees of Celsius, i.e. close to human body and other warm blooded animals have.
Is this just coincidence?
UPDATE
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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 ...
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Why does air get trapped below water pouring into a glass?
The drinking-water-tap at my workplace has a low pressure continuous stream of water. When I pour water into a glass which has at least about (depth) 5cm of water in it, surprisingly large air bubbles ...
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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 ...
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Albedo of water vs temperature
This question arose out of pure curiosity.
Is there a relation between the temperature of water and its albedo? Would the albedo increase if I increased temperature? Say I measure albedo by directing ...
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Rain drop trails on a car window prefer certain paths. Why?
Why do the raindrops always flow down in the middle?
That's a question given to me by my seven year old son.
Some background:
We are sitting in a bus with two windscreen wiper blades.
I hope that ...
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River freezing conditions
Quite uncommon -8°C here in Hamburg at the moment I write, and I thought: Surely our local rivulet is frozen over. In retrospect this was silly, the "rivulet" is 3rd order and has a very ...
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How come the filled water bottle work as a stylus for phone but not the empty bottle?
Take an empty plastic bottle, and make it slide on a mobile screen. You would find that it's not doing anything. Now filled up this bottle with water and try doing the same. This time you will find ...
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Using convolution to simulate acoustic dispersion in shallow water
Background
I'm a marine biologist who's trying to wrap my head around shallow water propagation. I'm interested in how acoustic dispersion (as described by Pekeris' waveguide) alters how sounds ...
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Under water light reflection of air in a cup vs water in a cup
The last time I was on vacation I was drinking on the swimming pool, and after I was finished with the drinks I started playing with the 2 plastic cups I had, and noticed that the air produces a ...
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Is it true that the bubbles do not touch each other in the boiling water while going up?
I heard once that the bubbles do not touch when the water is boiling. I want to know if that is actually happening, and I would be interested to hear why it is true or not.
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The highest density of water
If temperature is decreased, volume decreases. so density increases. But in case of water, its density increases up to 277 K, then decreases. Why does this happen? Why 277 K is water's highest density?...
