Questions tagged [ice]

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Is there a difference in speed of ice formation between a thick and thin water layer?

Here in the Netherlands we are always trying to get ice as soon as possible so that got me thinking. If you would build a thick layer of ice by spraying a layer of water and wait till its frozen, is ...
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Melt ice faster?

I had a discussion with a friend who claimed that vinegar is useful when defrosting a freezer because it lowers water's melting/freezing point. I disagreed, because I believe that the freezing point ...
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2answers
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Does the visible part of an iceberg depend on size?

Most people heard that we only see some % of an iceberg above water (10% etc). I suspect the exact % depends on the iceberg's shape (e.g. flat disc vs very narrow cylinder). But, assuming a similar, ...
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1answer
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Consider a cube of ice with volume equal to 3cm³ and a fixed density equal to 916g/cm3, How many of the molecules are in the surface of the cube? [closed]

This was a question that my fluid mechanics teacher ask today in class, I find the number of total molecules, and then my teacher says that we could search the size of one $\rm H_2O$ molecule, then I ...
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Does accelerating ice produce electromagnetic radiation?

There are at least two parts in this question. First one is does the interior of the ice produce radiation when it is accelerated? I guess it does not "because it is electrically neutral". ...
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Is there a frequency to which electromagnetic radiation would make an entire ice cube (or another material) vibrate?

Microwave oven radiation makes water molecules rotate. I just wonder if there is a wavelength, supposedly related to the lattice of water ice, molecules spacing, whatever, that would set the entire ...
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2answers
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Physics of an hypothetical animal attack (orca ramming through sea ice)

Question: Could an aquatic animal weighing 5,000 kg and traveling at 55 km/hr break through solid 11cm-thick ice? Context: I am writing a story and want the physics to be as accurate as possible. I'd ...
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1answer
31 views

While freezing ice from salt water, does the salt dissolve in the ice or is it separated out?

I know that salt decreases the freezing point of water. We have freezing point (in Celsius), $\mathrm{T_f=-K_f\cdot m}$ (molality of salt). But, is it true that all of the solution doesn't freeze at ...
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50 views

Melting ice under pressure

If we put a cube of metal on ice (ice with a certain thickness), under which conditions the cube will penetrate the ice? and how can we calculate the velocity of penetration?
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3answers
71 views

What gets warmer faster: icewater or just ice? [closed]

Revised Question (07/07/20 14:00 UTC) Working off of a suggestion by @GiorgioP: "Would it be fair to say that your question is about the difference of melting behavior of ice if surrounded by ...
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1answer
53 views

What will happen to a ice cube in space vacuum if you wrap it in aluminium?

What will happen to a ice cube in space vacuum if you wrap it in aluminium and make it orbit the sun like Earth?
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How can a large ice stupa melt in an extremely short amount of time?

I was slightly motivated by a related question on stack exchange, why does an ice stupa not melt for 6 months? I am asking the converse here, what shape will make a 2000 ton heavy stupa made of ice at ...
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1answer
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Why does this ice cube rotate when it melts on a flat platform?

I had incidentally noticed this. An ice cube that fell on the kitchen granite platform started to melt and as it melted it also started to rotate. I tried to stop it by touching it, but it starts to ...
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3answers
360 views

Why does an ice stupa not melt for 6 months?

https://www.youtube.com/watch?v=-1s0K_MKAgI&t=303s In this video at 3:55, Mr. Wangchuck explains that the ice stupa doesn't melt because it has less surface area for a given volume compared to ...
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1answer
806 views

Why isn't the surface of this frozen iced tea smooth?

Why is the surface of the iced tea in the pictures below so uneven? To give more details, today I tried (and failed) making iced tea. I placed a cup of hot water, after removing the tea bag, in my ...
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Model for ice sheet thickness [closed]

How should I proceed to find a formula $\lambda(t)$ for the thickness of and ice sheet in terms of The diference $T_{a}(t)-T_w(t)$ of the temperatures of air above the sheet and water below Thermal ...
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28 views

Why are the six prongs of a snowflake the same?

My understanding is that the variety in snowflakes is determined by pressure, temperature, and humidity. This is why the six prongs grow same way, because they are close enough that they are in the ...
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1answer
40 views

How does the melting ice cube in a glass of water doesn't change the water volume? [duplicate]

that's problably a very noob question, and answer that i found is: the water volume was always the same, what is kinda obivius, but doesn't seen enought to me. So I can't stop thinking, were did the ...
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3answers
48 views

If liquid water is constrained in vessel then the temperature is dropped below freezing will ice form?

If liquid water is constrained in vessel then the temperature is dropped below freezing what pressure would be measured assuming the vessel is unbreakable? Or put another way, will ice form if the ...
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2answers
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Why does ice make such peculiar sounds? [duplicate]

I've come across a couple of videos where some interesting sounds are produced using ice. (Click on the images to see the video.) Here, they drop a block of ice into a deep crevice and as the block ...
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1answer
26 views

How to avoid confusion of when to use and not to use the heat of fusion and condensation to get the amount of water in temperature equilibrium?

I'm not very sure of when should be used the heat of fusion and the heat of condensation for water. This happened when I attempted to solve a problem of this matter. The problem is as follows: A ...
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Crystals, symmetries in mixture

What would happen to the crystal structure of ice, if i freeze salt water? What changes in symmetry can i expect? I do not know the terminology for this stuff...but in what 'subclass' or 'subfamily', ...
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2answers
91 views

Does salt water melt faster or slower than pure water?

I am trying to conduct an experiment on the melt time time of two ice cubes with a different salt concentration, one with none and one with a lot. Does salt water melt faster than pure tap water? (...
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1answer
163 views

Salt water and ice, vs. plain water and ice

A famous puzzle is whether an ice cube melts to nothing more quickly in salt water or fresh water. The answer is fresh water, because the water melting off the ice cube sinks in the plain water and ...
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3answers
58 views

Why does reducing the contact area increase traction on ice instead of causing slippage?

I mean treads on tires, studs and snow chains. To begin with, I would think that reducing the area will increase the pressure causing the ice to melt and make it slippery as is the case with ice ...
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What is relation between Absolute humidity and frost formation?

We see frost formation on our car glass when ambient temperature is really low. I believe this frost formation comes from water vapour from the air. So should there be more frost formation with ...
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2answers
72 views

What will be the effect on the water level? [duplicate]

I came upon this question recently while studying about buoyancy. It goes like this: If an iron block is covered with ice and floats in a tub of water, what will be the change to the water level ...
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3answers
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Ice Melting Faster in Running Water?

Is it me or have anybody else noticed that ice melts way faster in running water than if you keep it in water or just keep it on any rigid surface.The difference is enormous .Why is it so?
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2answers
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How to calculate energy released by formation of frost on window during winter?

When the T ambient is low, we can see frost formation when the surface of window or surface is less than 0 degree C. But how to calculate the energy released during that frost formation at the window ...
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1answer
86 views

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 "...
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1answer
30 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 ...
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2answers
140 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
2k 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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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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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 ...
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2answers
110 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 ...
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4answers
2k 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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35 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 ...
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182 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 ...
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1answer
333 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 ...
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3answers
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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
606 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 ...
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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?
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3answers
130 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 ...
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172 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, ...
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1answer
63 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. ...
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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, ...
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3answers
855 views

If the thermal expansion coefficient of water was always positive, would ice sink?

I understand that having a negative thermal expansion coefficient means that instead of the material expanding as it heats up it contracts, which is what happens to water, and I know that the ...
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1answer
1k 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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