Questions tagged [ice]

Use this for questions related to the solid phase of Water ($\mathrm{H_2O}$).

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Types of water ice (I - XII) - any unique properties?

We know of the different phases of water that form in specific conditions, namely water ice I through XII. Each of those has a different molecular structure and varying density. Could you please list ...
Jacek Kołodziejek's user avatar
1 vote
2 answers
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Why are my ice cubes sticking in their containers?

I make my ice in those little round to-go containers that usually hold sauces/dressings. When using the clear containers, the ice sticks to it and requires heat or violence to get it out. When I use ...
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At what temperature does flowing water start to freeze?

We know that flowing water remains liquid even in the below-zero temperatures (a good example is rivers in arctic regions). Of course water doesn't remain liquid forever if temperature goes down ...
Snack Exchange's user avatar
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1 answer
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volume fraction of Ice Ih

we know that the volume fraction of a lattice like HCP is 74%. how can I calculate the volume fraction of a lattice of Ice Ih?
aaa's user avatar
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How much $\rm D_2O$ is in Earth's icepacks? [closed]

How much $\rm D_2O$, by mass and/or percentage, is locked in Earth's polar icepacks? Is the $\rm D_2O$:$\rm H_2O$ ratio the same as elsewhere?
RoUS's user avatar
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2 votes
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Is amorphous ice thermodynamically stable?

Amorphous ice is often produced by cooling liquid water below its glass transition temperature so fast that it does not have time to form ice crystals. The fact that this can only occur if the ...
tparker's user avatar
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Plane Couette Flow of Ice

I am trying to solve the following problem: The simplified Navier Stokes equation for plain Couette flow reads: $0 = \frac{1}{\rho}\frac{\partial \tau_{xy}}{\partial y}$ (at $y = 0$ fixed plate and ...
Nick's user avatar
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Does osmotic pumping continue in plants at sub-zero temperatures?

Every now and again I stop and notice something which I find surprising, and try to work out why or how it happened. In this case I would like some assurance with the explanation. We have a bucket ...
Arthur H's user avatar
7 votes
2 answers
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Is there a name for this phenomena that I observed?

I wish I had recorded this, but I was about to get some water from my filter as I was thirsty, but I noticed it had frozen in my refrigerator, so I poured some water into it from the refrigerator, and ...
Anders Gustafson's user avatar
4 votes
2 answers
118 views

On the Melting of the Arctic Ice [closed]

I have read that: Polar ice caps are melting as global warming causes climate change. We lose Arctic sea ice at a rate of almost 13% per decade, and over the past 30 years, the oldest and thickest ice ...
mlchristians's user avatar
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What is an average estimate for the energy between molecules (crystal bonding energies) in an ice sphere as a function of temperature?

To give some context, during collision between ice particles, it might be that some parts of the particles splinter off. I am trying to quantify that by a gross assumption that the latter is ...
numa's user avatar
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Calculating the time for a 31$\rm ^\circ F$ ice cube to melt?

Is there a way to calculate how long it would take for an ice cube to melt in relation to it being surrounded by different levels of insulation (Is R-value the best way to measure insulation for this)?...
CodeCamper's user avatar
2 votes
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How is underwater pressure affected by ice?

Let's say I have a bucket of freshwater exposed to an environment where ice can form (less than 0C, normal atmospheric pressure, etc.). The bucket is on the ground so ice will only form on the top and ...
ch701x's user avatar
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3 answers
370 views

Why does snow disappear without melting?

During very cold weather, snow often gradually disappear without melting.
Yitian Chen's user avatar
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1 answer
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How does "regelation" actually works?

About the mechanism behind regelation, I read that "increasing the pressure causes a decrease in the melting point of ice and hence the ice at the point of application melts and the water thus ...
Ankit's user avatar
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How can I keep my just bought dozen of popsicles cold as long as possible? [closed]

It's hot and I bought a dozen of pear popsicles. I discovered the fridge with freezer is dead. How can I keep them cold as long as possible so I don't have to eat them all at once?
MatterGauge's user avatar
4 votes
2 answers
278 views

Questioning solution of lake ice melting exercise

My thermodynamics teacher solved one exercise but I'm not convinced of his solution. The exercise asks this: A lake is covered by an ice sheet of thickness $D$ given. Ice latent fusion heat $\lambda$,...
Mattia's user avatar
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For liquids where the solid doesn’t float, how does the liquid freeze?

Take for example water; when water freezes, ice floats, and given a pond or something during the winter, the pond seems to freeze from the top down. Considering a similar circumstance, let’s say we ...
Justin T's user avatar
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If ice melting does not change the water level in a container - Why is everyone afraid of sea levels rising drasticing from ice sheets [duplicate]

I saw this experiment and am now wonder what I am missing in understanding if ice sheets melt why should they causing the sea levels to rise if it doesn't in a container ?
CanadianGoldGuy's user avatar
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Why don't substances other than water ice show regelation?

We know that ice shows regelation,but why don't other substances like iron rods or wood show the same phenomenon? Is there something special about ice?
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What is the adiabatic temperature gradient of ice?

What is the adiabatic temperature gradient of ice at Earth's surface conditions? The adiabatic temperature gradient is a non-conductive spatial temperature difference caused by acceleration on thermal ...
David Jonsson's user avatar
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Pressure of a vacuum left by melted ice

Let's assume we have a completely sealed uncompressible container filled with ice (without no air gap between the ice and the cap). At room temperature, when ice melts in water, as the density of ...
l4teLearner's user avatar
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1 answer
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How do you know when to use specific heat for ice or water? [closed]

A copper calorimeter can with mass $\rm 0.100 \ kg$ contains $\rm 0.160 \ kg$ of water and $\rm 0.0180 \ kg$ of ice in thermal equilibrium at atmospheric pressure. If $\rm 0.750 \ kg$ of lead at $\rm ...
god david's user avatar
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2 answers
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I'm really confused on the formula $Q=mL$ on phase change

"A 6.00 kg piece of solid copper metal at an initial temperature T is placed with 2.00 kg of ice that is initially at -20.0°C. The ice is in an insulated container of negligible mass and no heat ...
god david's user avatar
2 votes
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Force field lines in surface ice

The question Melting ice pattern shows a single hole melted in ice. The picture below shows multiple holes of the type described in that question, and there are lines in the ice between the melted ...
Rodger Mattlage's user avatar
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How can this dimensional analysis of cooling rate account for a fixed ice cube volume

This Wikipedia article describes an analysis of the dependence of the cooling rate of an ice cube in water on the cube edge length, $L$. It claims that Buckingham's $\pi$ theorem predicts a cooling ...
mitte's user avatar
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34 votes
3 answers
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How does a river freeze when the water keeps moving?

It's cold outside right now, and the biggest river in the country has frozen over. We're talking about a minimum of 500m in width, and I've no idea how deep (but some pretty big ships can sail there). ...
Vilx-'s user avatar
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Does liquid water remain at thermal equilibrium with ice at the melting point of ice?

Suppose, I have a glass of water. Now, I begin cooling it until it reaches $0^{\circ}\rm C$. Just after it reaches $0^{\circ}\rm C$, I stop cooling it. Again suppose I have an ice cube. Now I begin ...
tryingtobeastoic's user avatar
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438 views

What is the resonant frequency of ice? How could you calculate the resonant frequency of ice for a cylinder of ice? [closed]

Can vibrating frequencies break apart the structure of ice? Or could electromagnetic frequencies do the same?
Jason's user avatar
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1 vote
3 answers
2k views

Why will the water not overflow when ice melts?

This is an old question but still there's something I could not understand. Here it goes: A glass of water has an ice cube floating in it.The water level just touches the rim of the glass. will the ...
Kashi's user avatar
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16 votes
1 answer
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Why do my "steel ice cubes" have water in them?

I recently bought steel ice cubes. A better name is probably "steel cubes with unidentified liquid" which I presume is water. When I opened the package I was quite surprised that they ...
ludz's user avatar
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Why is my watter bottle wet after the water inside it unfreezes?

I have a filled, warm, and dry (on the outside) water bottle that I put in the freezer. The next day I come and take the water bottle out of the freezer and towel dry the ice gathered around the ...
innating's user avatar
6 votes
1 answer
383 views

What’s the intuition behind snowflake symmetry? [duplicate]

What’s a more rigorous description of why snowflakes are so symmetric? The general explanations of why they’re symmetrical are: Theyre not. The branches actually vary. Snowflakes are somewhat ...
Al Brown's user avatar
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2 votes
2 answers
381 views

Why do icebergs flip over?

Why do icebergs flip over? Are certain shapes of icebergs more "stable" than others, in that it's harder to flip them over? If so, why? For example, it somehow makes intuitive sense, that a ...
Maj Zobrani's user avatar
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1 answer
57 views

How could you make realistic Frostwalker boots? [closed]

In Minecraft, as you might know, you can enchant boots with Frostwalker, which freezes water as you walk over it. I've been wondering if this would be possible in real life, and if so, how? My idea is ...
Pycoder's user avatar
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1 answer
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Is supercooling water reversible?

Water can exist in a supercooled state. Even at $-48,3$ degrees Celsius it can be liquid. Below that temperature, the water will freeze. If I cool the ice to, say, $-60$ degrees and heat it slowly ...
Deschele Schilder's user avatar
-2 votes
1 answer
86 views

Can ice patterns form on the top of deep water?

Here is a picture of a pattern in ice: There are feathers, or flowers to be seen. The ice has grown on a solid underground. Water condenses on the solid underground and freezes. I have never seen ...
Deschele Schilder's user avatar
0 votes
2 answers
407 views

Time required for the formation of ice of some thickness in a lake

The air above a large lake is at –2°C, while the water of the lake is at 0°C. Assuming that only thermal conduction is important and using relevant data selected from the given below find how many ...
sameed hussain's user avatar
0 votes
3 answers
12k views

Is ice always at 0 degrees Celsius? Does the temperature of ice get below that? [closed]

A rather simple analogy/explanation would be appreciated.
Shahzad Rahim's user avatar
68 votes
2 answers
9k views

Why was water freezing almost instantaneously when shaking a bottle that spent the night outside during a frosty night?

Due to the forecasted frost last night, I placed yesterday evening, some 1.5l standard PET bottles filled up to 90% with warm tap water(+60°C) close to some vegetables that I wanted to protect in my ...
s.k's user avatar
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4 answers
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Can water in solid state (ice) be at such a low temperature that in contact with liquid water at 0, freezes it and leaves it at a lower than zero C°?

I recently had a discussion with a bio engineer and we are both pretty convinced of different outcomes for the same situation: Say you have a glass half full of liquid water at 0°, could you get a ...
apacay's user avatar
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7 votes
1 answer
90 views

How can such a mushroom ice shape grow from a water fountain?

Recently I stumbled upon a funny picture of a frozen water fountain. The frozen fountain resembles a mushroom: Source: https://izismile.com/2021/02/19/this_is_extremely_rare_50_pics.html The longer I ...
peter_the_oak's user avatar
3 votes
1 answer
59 views

Why does ice fragment vertically?

The pool in my back yard froze over, and now that it's warmer it is starting to break up. But I notice that the ice is marred by fractures, and that they all seem to be completely vertical. Handling ...
noughtnaut's user avatar
1 vote
0 answers
37 views

Physics of ice around: Breaking the Ice

I was removing ice on my driveway and had a very hard time. And I am wondering what are the factors that determines the hardness of ice, and also the stickiness. one thing that I noticed about the ...
yupbank's user avatar
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4 votes
1 answer
193 views

What are these geometric patterns on ice?

In a winter day, I noticed the water frozen inside a canal in our building. As you see there are very nice geometric patterns formed by the ice, with specific angles. What is the physical ...
Ali Seraj's user avatar
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32 votes
1 answer
705 views

Why are snowflakes flat?

There have been many questions and excellent answers in this community about the symmetry of snowflakes, e.g., here and here. There is however one aspect of snowflakes that does not seem clearly ...
Roger Vadim's user avatar
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41 votes
8 answers
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Why do small patches of snow remain on the ground many days or weeks after all the other snow has melted?

I often notice small patches of snow that remain on the ground in seemingly random locations, many days or even weeks after all other snow in an area has melted, and even when temperatures have been ...
user3091's user avatar
  • 519
1 vote
1 answer
90 views

What quantity of freezing water could generate 300,000 joules of mechanical energy from expansion - enough to boil an electric kettle? [closed]

When water freezes, it expands with considerable force - enough to break glass and burst through copper water pipes. If this material expansion was harnessed - e.g. liquid water placed in a container ...
Amphibio's user avatar
  • 1,049
28 votes
5 answers
7k views

Why is the air inside an igloo warmer than its outside?

An igloo is not only used as shelter from snow but also to keep warm. Perhaps, a simple igloo is made of ice and nothing else still, why is its interior warmer than the exterior?
user6760's user avatar
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2 votes
0 answers
66 views

What mass of pure ice would be melted by 1kg of salt at a given temperature? [closed]

Salt melts ice by disrupting the molecular bonds of the lattice, producing salty water (brine). But brine has its own freezing point. If the brine gets too cold, it begins to form ice, and the ...
Robbie Mallett's user avatar

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