# Questions tagged [ice]

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### How deep must Earth's ocean be to form Ice VII on bottom?

Is there way to tell how deep must Earth's ocean be to form Ice VII on bottom? Or is it impossible because of our planet is too small? As I know, in 11.5km Mariana Trench there is 108 MPa and to form ...
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### Pauling's derivation of the residual entropy of ice

I am trying to understand Pauling's derivation of the residual entropy of ice (link). First let me paraphrase Pauling's argument. He supposes that every oxygen atom (let's call one of them $A$) is "...
24 views

### Why does water freeze radial around an object?

I noticed an interesting fact today while having a popsicle during my lunch break. When I bit the top of, I could see that in the freezer the ice had frozen radial around the stick. Could anybody ...
93 views

### Why is it better to let your wheels roll in ice?

I've recently read that if you're driving in icy conditions and begin to slip, it's better to not tap on the breaks, and instead, allow the vehicle's wheels to continue rolling. Why is this the case? ...
169 views

### How long does it take to cool down a drink with ice?

If I have a bottle or container with X fluid ounces of water at temperature Y (say, fridge temperature or room temperature), and I put ice or ice sticks (composed of water) in it that make up Z fluid ...
65 views

### Minimal work required to produce ice at room temperature

I'm wondering about the most efficient way of producing ice from water at room temperature. First of all: why, in principle, do we need to put in work to do so, if water gives off energy while ...
43 views

### Sensitivity of latent heat of fusion of ice on temperature and pressure

The enthalpy of fusion is the heat necessary to convert 1 kg of ice to liquid water. According to Wikipedia, this heat equals 333,55 kJ/kg. Does this heat change with the temperature or pressure and ...
91 views

### Density of ice < water?

In the situation of an ice cube placed in water and eventually melting, it is supposed that natural convection is the process in which heat transfer from water to ice occurs. However, natural ...
1k views

### How does ice melt when immersed in water?

When an ice cube is immersed in water at a room temperature, how is the thermal energy from the water transferred to the ice cube? Currently I have two answers: Infrared radiation from the water ...
30 views

### How can I get the height that sits above the waterline of a partly-submerged object?

If I know the density of water (say 1024 kg/m^3) and the density of ice (say 900 kg/m^3), and the volume of an object (say 8 x 10^9 m^3), how can I figure out how much of it is sitting above or below ...
120 views

### Can we use the power of ice to float to make free electricity?

ice and water have a volume to weight ratio of 12/11 so 11 tons of ice will support 1 ton of weight 1 ton of ice takes 1000 watts or 12000 b.t.u. of energy to be produced question is, at what depth ...
143 views

### Equilibrium between Steam and Ice

Problem Statement: $15 \ g$ of steam at $373 \ K$ ($100^{\circ} \ C$) is mixed with $25 \ g$ of ice at $273 \ K$ ($0^{\circ} \ C$). What is the final temperature of the mixture. My Question: The ...
61 views

### water pipes break when temperature goes down, how to estimate the energy involved?

Normally low temperature is associated with lower energy state and high temperature with higher energy state. There is an apparent paradox when a water pipe breaks due to low temperature: when ...
381 views

### Why does an ice-cube turn faster and faster while melting in water?

Whenever I put an ice-cube into a glass of hot water, so that it melts quickly, and it is initially rotating slowly, I noticed that its rotational speed increases as it melts and 'shrinks'. Why? I ...
20 views

### Can dry fur (or any natural fibre substance) stick to a surface ice?

With the lack of moisture, that would come from the skin, could a natural fibre substance (e.g. polar bear fur) possibly stick to a surface of ice?
99 views

### Could a microwave oven be tuned to defrost well? [closed]

Typical microwave ovens do a lousy job of defrosting because liquid water absorbs their radiation far better than ice. So once a spot melts, it will quickly rise to cooking temperature while the rest ...
93 views

### Can shining a laser pointer on an Ice Cube melt it?

I heard in videos that if you use a laser pointer (Green if I recall) and point it on a ice cube, that it would cause it to start melting, is that true? I know that light carries energy and momentum, ...
43 views

### Ice formation in a cavity that was sealed at ambient condition and taken to space

I have a hardware with a cavity that was closed (welded) at ambient conditions (298K, 1 bar Pressure and 50% RH). The hardware was taken to space where the temperature can go down to near zero Kelvin. ...
53 views

### Ice blocks melting outdoors [closed]

I have a question, that is not related to anything academic. We are planing a festival in winter, that will have some stage set up of ice blocks. There will be several big rectangular prisims of ice, ...
678 views

### Turning water to ice in vacuum

My 9yr old is inspired to try to make ice with a vacuum after seeing an exhibit do just that at room temperature at the Exploratorium in San Francisco. He's using a motorcycle vacuum brake bleed pump ...
66 views

### What wavelength of light has the greatest rate of reflection off of ice?

We are using a camera that is nearly flush against frosted ice (not perfectly clear, but pretty close). We are currently using white LED's, but very little of the light gets reflected back into the ...
237 views

### Can steam freeze via adiabatic expansion?

Context: At the end of animation movie Steamboy, a huge steam engine's pressure vessel breaks, which results in the escaped steam freezing to ice. I've been thinking about this -- is it really ...
2k views

### Does the shape of ice affect the amount of heat required to melt it

Is the amount of heat required to melt a $0^\circ C$ 10cm x 10cm x 10cm cubic ice equal to the amount of heat required to melt $10^{15}$ piece $0^\circ C$ 1$\mu$m x 1$\mu$m x 1$\mu$m cubic ice ? I ...
976 views

### How fast can water from a lake be frozen?

Warning: this question contains spoilers for the first episode of 2018 TV series Lost in Space by Netflix. On the series, the Robinsons spaceship, Jupiter, falls on a planet, and it’s submerged in ...
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### What is the enviroment in which water will come out of an ice fishing hole?

I have watched some videos on YouTube of people cutting holes in ice and water not just finding equilibrium in the hole, but water actually coming out of the hole along with many fish. There has to be ...
574 views

### Final temperature of ice and water [closed]

My answer doesn't seem likely but I can't see where I've gone wrong: Q: Ice of mass 0.125kg at -5 degrees is added to water of mass 0.25kg at 8 degrees. Calculate the final temperature of the water ...
639 views

### Melting of ice on applying pressure

Can someone explain why ice melts on increasing pressure based on Le Chatelier's principle? By the principle, ice will try to oppose increase in pressure. It can do so by increasing volume right? But ...
87 views

### Icy roads while the temperature is above 0 Celsius?

The temperature last night in my suburb and in Montreal was 4 Celsius at 9 P.M. . The snow and rain of the day had melted and the roads were damp but not icy. This morning at 5 A.M, the temperature ...
16k views

### Strange ice found in my garden

This morning I found a really strange ice formation in my garden. I can't figure out how it appeared, because there was nothing above. The night was particularly cold (Belgium). To give an idea, it ...
48 views

### Why was there frost on the inside of my windshield? [duplicate]

I usually start my car remotely and let it warm up before I leave for work. This morning I forgot to start my car beforehand, so I had to scrape the ice off the windows. I was surprised to find frost ...
136 views

### What was the rainbow like object I saw in ice crystals this morning?

This morning, while driving to work, I saw a rainbow-colored pillar formed by ice crystals frozen out of furnace exhaust from chimneys. It was very broad - a bit wider than my (large) hand at arms ...
469 views

### Fastest way to melt ice cubes in glass of water

I'm in a restaurant and order a glass of water. What I get is about 50% water 50% ice cubes. So, after finishing my water, I'm left with half a glass of ice cubes. I'm in a hurry, so need to leave as ...
52 views

### Tongue and frozen metal [duplicate]

I understand that when you put your tongue on frozen metal, your tongue sticks to the metal but how does having a layer of ice covering the metal prevent your tongue from sticking?
121 views

### Will a vinegar and water mixture prevent ice from forming?

A trivia game I was playing made the claim that a vinegar and water mixture can be used to melt ice. Google lead me to Snopes.com, which claims that the mixture will prevent ice from forming instead ...
11k views

### Why does ice cream get harder when colder?

What would seem to be a silly question actually does have some depth to it. I was trying to scoop out some of my favorite soft name-brand ice cream when I noticed it was frozen solid, rather than its ...
202 views

### Running vs. walking in slippery condition

We are experiencing warmer weather than normal, which is causing the snow to melt and re-freeze daily. This has led to very slippery conditions. A few years ago, I was running in similar conditions, ...
57 views

### Can ice burn you from it being hot (not a frost bite sort of burn)?

The phase diagram of water implies that at a high enough pressure (100 kbar) that very hot 300°C ice can exist. Researching about ice burning someone just nets results on frost bite (which is ...
3k views

### Why are some parts of this ice block cloudy and other parts clear?

I had a sprain in my leg a few days back. The doctor recommended dipping my foot alternately in ice-cold and hot water to aid blood circulation. It is here that I discovered something interesting. ...
418 views

It is a well known fact that water expands when it freezes, and here's one of the explanations I found on Physics SE: Why water expands when freezes? "The expansion upon freezing comes from the fact ...
33 views

### Wind erosion of Ice

I saw this video on Youtube https://www.youtube.com/watch?v=Hs5iXGJVkb8, but I really don't how answer this question: How is it possible that wind can cause ablation of ice? I know that ice can ablate ...
319 views

### Frozen Pepsi when opened began to fizz and release lots of $C O_2$ and a thick sugar syrup mixture

I left a bottle of wild cherry Pepsi in the freezer to cool and forgot about it over night. When I remembered to check it the Pepsi was entirely frozen and the bottle it was in thankfully did not ...
416 views

### Volume of melted polar ice caps

If (or rather when) the polar ice caps melt, will they occupy more, the same or less volume? Somehow all options seem possible to me. I don't assume they are just big ice cubes floating on the poles....
20k views

### Does the sea level increase if an iceberg melts?

It was claimed that if an iceberg melts in the ocean, the sea level won't change as the ice displaces as much water as there will be melted water. The other claim was that the sea level should rise ...
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### Feynman Lectures I 1.2 - Note on a Statement

In the Feynman Lectures, Richard Feynman makes the following statement: The particular crystal pattern of ice shown here has many “holes” in it, as does the true ice structure. When the ...
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### Why is this ice so stubborn? [closed]

In central India summers are extremely hot. So in order to stay hydrated we (a.k.a. me and a couple of friends) have been advised to carry with ourselves a refresher (which is basically a flavored ORS ...
3k views

### Which would melt faster on the sidewalk, equal volumes of snow or ice?

Whilst walking back from class, I noticed the piled snow on the sides of the street still hadn't melted after a week despite it being sunny and generally warm $(15°C-18°C)$. "If that snow was ice, ...
9k views

### Why do ice cubes shrink in the freezer?

OK before you all yell "EVAPORATION", I know that's the boilerplate answer, but why and how. Back in high school we were taught water, and most other elements and compounds, have three states, solid, ...
63 views

### Ice melting equation units don't match?

I am working on a model to simulate algal growth in Antarctica, and want to incorporate surface ice melting. I found this equation for melting: $$\frac{dV}{dt} = \frac{-kAT}{\rho L_f}$$ where $V$ is ...