The ice tag has no wiki summary.
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Time constant of ice melt
I'm familiar with problems of "how much ice can you melt given some amount of energy", but I'm writing to get some clarification on the time constant of this event. This question might be somewhat ...
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Thermodynamics of supercooled water
Now that it's been freezing outside for the last few days, I experimented a bit with supercooling. I've left a bottle of clean water outside for a few hours, and behold, when I shook the bottle, the ...
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393 views
What is the status of Mpemba effect investigations?
There is this puzzling thing that is called Mpemba effect: paradoxically, warm (35°C) water freezes faster than cold (5°C) water. As a physisist, I've been asked about it several times already. And I ...
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1answer
36 views
Melting ice pattern
What causes ice to melt in these patterns?
And why does this always happen when the ice is covered in snow?
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1answer
50 views
calories in ice
Food contains calories, which is nothing but a measure for energy. 1 calorie = 4.18400 joules
if I am not mistaken. Does this mean that food contains less calories when it is colder?
Obviously I'm ...
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0answers
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How does a snowflake “know” to form symmetrically? [duplicate]
Possible Duplicate:
Why are snowflakes symmetrical?
Under ideal situations, a snowflake forms into near perfect hexagonal symmetry. How? For instance, when a water molecule moves towards ...
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4answers
264 views
Water to ice expansion in $1\textrm{mm}^3$ pit - pressure on the pit walls?
[EDITED] by mistake, the subject was regarding 1m^3 instead of 1mm^3. There should be a significant difference between the two...
A 1x1x1mm pit filled with water is frozen at a slow rate (1K/minute). ...
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2answers
60 views
How to detect ice in thermostat
I think of making precise thermostat based on ice-water phase transition.
The idea is to keep 50% ice content, and monitor that instead of temperature.
I am thinking of monitoring dielectric ...
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3answers
448 views
Freezing point depression - cooling my drink with the same method as salt on a highway?
I understand that adding/sprinkling, say NaCl, on a highway depresses the freezing point by making any moisture on the road harder to freeze as the NaCl molecules get in the way of phase transition. ...
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1answer
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How wide does a wall of ice need to be to stay in place?
Let us say that we have unlimited manpower to construct a huge wall of water ice e.g. 200 m tall (700 feet). -and that the wall is placed in a climate, where the temperature never (for your purpose) ...
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4answers
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Why are snowflakes symmetrical?
The title says it all. Why are snowflakes symmetrical in shape and not a mush of ice?
Is it a property of water freezing or what? Does anyone care to explain it to me? I'm intrigued by this and ...
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1answer
651 views
Why did my liquid soda freeze once I pulled it out of the fridge and opened it?
This isn't a duplicate to "Why did my liquid soda freeze once I pulled it out of the fridge?". My question is why soda froze after it was opened. Opening a can or bottle seems to have a larger effect ...
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1answer
703 views
Why did my frozen water bottle explode when I opened it after it defrosted a bit?
Last night I filled a 20 fl oz bottle (http://www.thenibble.com/reviews/main/beverages/soft-drinks/boylans-mash.asp) with lukewarm water from my tap. I filled the bottle pretty much to the brim, ...
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1answer
110 views
Name of the process that causes ice to melt under pressure and refreeze after
I remember a physics experiment from school where a wire with weights on each end was placed over a block of ice.
The pressure of the wire caused the ice to melt underneath and refreeze once the ...
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4answers
737 views
What happens to water level when ice XII melts?
There exists this famous idea that if all floating icebergs melt, water level will stay the same (because the water replaced by ice is the volume of the melted ice). Now,
Is this always so, if you ...
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2answers
804 views
How does the process of freezing water remove salt?
How does freezing water to make ice remove whatever salts were in the water to begin with?
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Ice skating, how does it really work?
Okay, some textbooks I came across, and a homework assignment I had to do several years ago, suggested that the reason we can skate on ice is the peculiar $p(T)$-curve of the ice-water boundary. The ...
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2answers
188 views
Why did my windshield freeze instantaneously?
It was very cold outside, this morning, when I took the car that slept in the snow, with a simple cloth on the windshield. I entered the vehicle, drove a kilometer or so. The air inside was so cold I ...
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1answer
616 views
Where are the ice rings in X-ray crystallography located?
I threw this image of one of my protein crystal's diffraction pattern (not the greatest) on a poster, and was wondering where (what reciprocal dimension) the ice rings are located as it might be a ...
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1answer
191 views
Why does salt on snow create Ice?
I think I kind of understand this process but I would like someone to explain it more completely.
For those who aren't aware here is the scenario I'm talking about:
As terrain maintenance at my ...
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2answers
985 views
ice in a microwave
I have noticed that when I microwave an ice cube it appears to melt more slowly than I would expect. For example, an equal volume of water starting at 0 deg C would probably be at boiling point before ...
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4answers
289 views
what cools bottle of water faster: ice or snow
Imagine you have a pile of snow and a pile of ice shards. You put a soda bottle which has a room temperature into both piles. Which bottle is going to cool down faster?
