# Questions tagged [thermal-conduction]

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### Why does cold metal seem colder than cold air?

(I apologize for this elementary question. I don't know much about physics.) Let's say that I put a metal pot in the refrigerator for several hours. At this point, I guess, the pot and the air (in ...
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### How does hot air rise?

If a balloon is filled with hot air, it is rising due to buoyancy: the mass of the hot air inside the balloon is lower than the mass of the same volume of the cold air outside the balloon cavity. ...
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869 views

### What does the concept of "Entropy Flow" mean in detail?

Recently a found a paper on the thermoelectric effect: https://williamsgj.people.cofc.edu/Thermoelectric%20Effect.pdf When I started with Chapter 5 "Irreversible Thermodynamics" I struggle ...
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### Are specific heat and thermal conductivity related?

Are there any logical relationship between specific heat capacity and thermal conductivity ? I was wondering about this when I was reading an article on whether to choose cast iron or aluminium ...
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### How does the sun's surface conduct thermal energy from the convective zone to the corona?

How does the surface of the photosphere conduct thermal energy from the convective zone to the corona, while remaining at such a relatively low temperature itself? It seems odd to me that the ...
• 448
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### Doubt in definition of linear thermal expansion

It's stated in my textbook that upon heating a rod , the linear change in its length is directly proportional to its original length and the change in temperature , therefore the equations should look ...
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### How does the drift velocity of electrons in a conductor depend on the temperature?

How does the drift velocity of electrons in a conductor depend on the temperature? I have two contradicting views for this. First, we can say that increasing the temperature of the conductor will ...
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