The freezing tag has no wiki summary.
2
votes
0answers
19 views
Can one get clear ice crystals from a dirty suspension?
Euteictic freeze crystallization is a method where an electrolytic solution is cooled and separated into a stream of (relativly) clean, pure ice and a salty brine. I know anectdotally of wine ...
1
vote
1answer
56 views
Electromagnetic field to cool a substance?
I saw somewhere that an electromagnetic field would cause a substance to let off thermal energy, ultimately resulting in the substance to cool really quickly.
If this is possible, does the strength ...
1
vote
2answers
155 views
Freezing point of water with respect to pressure.
I know when the pressure is reduced, the boiling point of water is reduced as well. But how does the pressure affect the freezing point of water ?
In a low pressure environment is the freezing point ...
1
vote
1answer
49 views
How does the size and load of a freezer affect the rate of freezing of an item?
I undertsand the size and load of a freezer can affect the rate a freezer will freeze food. I thought the temperature alone was the major factors which determined how fast/slow food freezes in ...
2
votes
0answers
43 views
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 ...
3
votes
3answers
459 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. ...
0
votes
1answer
51 views
Freeze and “break apart” an object. How?
Is it possible to freeze an object, say an apple, and then drop it so that is will break apart into pieces? And if so, how can it be achieved?
1
vote
1answer
260 views
Liquid with freezing point above 0 Celsius that could be use at ice rinks
Please help me with an answer to my dilemma:
Is there a liquid that could be used to fill an ice rink (non-explosive, non-poisonous, etc), and have the freezing point above 0 Celsius?
0
votes
2answers
139 views
Why laundry dry up also in cold/frost?
Why laundry dry up also in cold/frost? When you have frost, water in the clothes should freeze, but if clothes are dry, then it should be possible that steam in the clothes does not have time to ...
5
votes
1answer
965 views
What happens to the temperature of the water when you add salt to a bowl of melting ice?
If you have a bowl of ice that's melting, so the ambient temperature is just above 0 °C, what happens to the temperature of the water when you add salt?
I know that the freezing point of salt water ...
2
votes
1answer
80 views
can hydrogen stay frozen in vacuum?
I've look into the hydrogen state diagram, and it seems that it can be frozen under pressure.
Question: Does this mean that hydrogen cannot be kept frozen in a vacuum chamber?
8
votes
2answers
395 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 ...
3
votes
1answer
187 views
Cause of sea ice freezing during an upwell event
One of the Episodes of BBC's documentary Frozen Planet describes an upwell phenomenon in the Antarctic Ocean. I am trying to understand the cause of seawater freezing when this upwell occurs.
Liquid ...
2
votes
1answer
707 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, ...
2
votes
4answers
1k views
What kinds of materials contract the most in cold temperatures?
I know that water expands in the freezer, but I'm curious about which materials contract in response to cold temperatures --- and most importantly, which ones undergo the most drastic changes?
9
votes
3answers
1k views
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 ...
1
vote
0answers
608 views
Easy to obtain liquid with freezing point a couple of degrees above 0 Celsius [closed]
Please advice me a liquid whose freezing point is 2-5 Celsius.
I know that the solution of salt in water can have freezing point of about -3 Celsius. I would like to know if similar liquid but with ...
3
votes
2answers
249 views
Will the water added to an ice piece freeze?
Water, at room temperature is poured into a hole made of a block of melting ice(kept at room temperature).I was wondering if the water will ever freeze?
Thank you.
12
votes
4answers
2k views
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 ...
6
votes
3answers
2k views
Why does frozen water burst a pipe?
When water freezes in a pipe it can crack the pipe open. I assume this takes quite a lot of energy as when I try to crack a pipe it can be hard work!
I think water freezing is a result of energy ...
7
votes
4answers
2k views
Dangers of using liquid nitrogen
So, I remember in college physics the prof using liquid nitrogen in a demonstration. When he was done, he threw the container of LN at the front row, and of course it evaporated (or whatever) before ...
4
votes
1answer
738 views
How can I prevent drinking water from freezing in cold weather? [closed]
I'd like to keep a container of potable water in my car for when I get stuck, but in the winter it gets cold enough for bottled water to freeze.
I can't put salt in it, because then it won't be ...
4
votes
2answers
421 views
Why does a slight drip of water protect pipes from freezing?
I've heard that turning on faucets to a slight drip will prevent pipes from freezing, but I've never understood why this is the case. Can anyone out there help me to understand? Thanks!
1
vote
2answers
3k views
How does watering your plants help protect against freezing?
I've always heard that watering plants if the temperature goes a few degrees below freezing will help prevent them from freezing, but I've never quite understood the physics behind it. Can you guys ...
