Questions tagged [ice]

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1answer
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 ...
2
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2answers
74 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? ...
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2answers
85 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, ...
2
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2answers
62 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 ...
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2answers
88 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 ...
116
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2answers
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 ...
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2answers
59 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 ...
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2answers
2k views

How much water from ice and after how much time? [closed]

I need two formulas in dealing with ice and water. First: If I have 2 x 2 x 2 (cm) ice cube, after it melts, how much water will there be ? Second: If I have 2 x 2 x 2 (cm) ice cube, after how ...
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0answers
37 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 ...
7
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4answers
890 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 ...
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0answers
26 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 ...
0
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2answers
208 views

Why does only the surface of water get frozen in polar countries?

In polar countries, it only seems to be the water on the surface that freezes. If I kept glass full of water in the freezer, then not only the surface, but the entire glass of water freezes, why?
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2answers
190 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, ...
1
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1answer
90 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 ...
40
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4answers
3k 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 ...
2
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3answers
60 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 ...
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2answers
363 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 ...
6
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3answers
1k views

Do objects sink in ice?

The title explains it all. Do objects suspended in ice sink over time? You may remember the story of World War 2 planes that were found 260 ft under the ice which would be anachronistic with seasonal ...
6
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3answers
18k 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 ...
2
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1answer
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?
2
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3answers
93 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 ...
2
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4answers
878 views

Lake Ice Temperature

Given: A lake with an established sheet of ice of some nominal thickness covering it. It is night (no radiant energy from the sun). No wind. Air temperature -10 degrees Celsius. Will the temperature ...
2
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0answers
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. ...
2
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0answers
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, ...
7
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2answers
17k views

Why did my liquid soda freeze once I pulled it out of the fridge?

Can someone explain in both layman's terms and also technically why when I pulled my glass filled with liquid soda from the freezer, the liquid soda quickly froze? Doesn't this violate the 2nd law of ...
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0answers
25 views

Why does ice form when you break the seal on a very cold bottle of water? [duplicate]

I put a sealed bottle of commercially available drinking water in a freezer and let it get really cold, but not frozen solid. The water is not carbonated. Then I remove the bottle and place it in a ...
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5answers
7k views

Can you make ice red hot?

This video clip allegedly shows an otherwise unspecified ice cube that turns red hot (and burns) due to induction heating. Can somebody explain how this works?
14
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2answers
1k views

Why do crystals grow in preferred directions?

I want to know why snowflakes (and other crystals) grow symmetrically and I find the leading answer to the established question to be entirely unsatisfactory. When water freezes, you get ice. Ice, ...
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3answers
935 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 ...
55
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8answers
94k views

Why does ice melting not change the water level in a container?

I have read the explanation for this in several textbooks, but I am struggling to understand it via Archimedes' principle. If someone can clarify with a diagram or something so I can understand or a ...
0
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1answer
618 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 ...
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4answers
6k views

Which one is colder? Zero temperature ice or zero temperature water?

I like to understand that which one of the following items seems colder, when we touch them? zero temperature ice zero temperature water Why?
1
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1answer
61 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 ...
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0answers
201 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 ...
3
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3answers
6k 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. ...
5
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6answers
2k views

How can removing energy from a system do work? (ice)

Water freezing into ice expands, damaging roads, breaking rocks, etc. To my understanding, this is doing work (in a physics sense) by removing energy from the system. How is this possible?
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3answers
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 ...
2
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2answers
43 views

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 ...
3
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1answer
2k views

Ice melts slower in salt water?

We did a little kichten experiment today where we put ice cubes in glasses of water. We had one glass with normal tap water and 5 glasses which increasing concentrations of salt water. My hypothesis ...
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1answer
476 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 ...
3
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1answer
602 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 ...
0
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1answer
244 views

Are There Any Theories To Explain Why Ice Freezes in Orthogonal Patterns on Surfaces Such as Glass

If one examines the following image: One will notice that the ice is freezing in this characteristic criss-cross pattern. Are there any theories to explain this behavior? I've seen this on car wind-...
2
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2answers
85 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 ...
33
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2answers
2k views

Frost bubble formation

I woke up recently to find the following structures on my lawn; they resemble bubbles, but are formed from ice (we had a moderate frost overnight). There were eight of these 'bubbles' on my lawn and ...
195
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1answer
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 ...
3
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1answer
295 views

How can towtrucks tow a heavy truck on icy roads?

(This isn't hardcore physics, but bear with me. I've been watching too much Highway Thru Hell and I'm curious about this) A common problem on the Highway Thru Hell TV-show is trucks stuck on an icy ...
36
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6answers
36k views

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
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 ...
0
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1answer
434 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 ...
27
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6answers
9k 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 ...