All Questions
121
questions
0
votes
6
answers
152
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Why won't there be any transfer of heat energy when ice at 0°C is in contact with water at 0°C in a closed container?
In my book, Concise Physics of Selina Publications for Class IX, it's written there that "If there is no transfer of heat between the two bodies placed in contact, they are said to be at the same ...
- 23
0
votes
1
answer
38
views
Water and ice, scales [closed]
There are scales with an identical bowl on each pan. We pour some amount of water into the first bowl. We pour less water and put an ice cube into the second bowl so the level of water in both bowls ...
- 23
7
votes
3
answers
4k
views
Why does more ice melt slower than less ice?
I know that ice cubes that are larger melt slower because of their surface area. However, when you put more ice cubes in a cup, all the cubes melt slower than a cup with less cubes. I hope this makes ...
- 539
1
vote
1
answer
4k
views
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 ...
- 402
7
votes
2
answers
331
views
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 ...
- 2,001
2
votes
1
answer
86
views
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 ...
- 23
0
votes
3
answers
1k
views
Why does snow disappear without melting?
During very cold weather, snow often gradually disappear without melting.
- 605
4
votes
2
answers
432
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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 $\lambda$,...
- 338
0
votes
2
answers
151
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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 ...
- 157
0
votes
2
answers
497
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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 ?
0
votes
0
answers
112
views
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 ...
- 163
0
votes
1
answer
263
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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 ...
- 23
0
votes
2
answers
528
views
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 ...
- 23
34
votes
3
answers
6k
views
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).
...
- 3,101
1
vote
1
answer
637
views
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 ...
- 1,018