All Questions
Tagged with material-science temperature
64
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Amount of extension of the metal rods in the same system
If we heated two identical metal rod both vertically and horizontally, we would observe that it expands. However, if the rod is placed vertically, gravity will indeed play a role. The expansion of the ...
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3
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Why does a mixture of bulk $\rm Hg$ + $\rm Cd$ +$\rm Te$ melt at a much lower melting point than any of its constituents?
In a real life setup, a mixture of $\rm Hg$, $\rm Cd$, and $\rm Te$ melts at approximately 330 degrees Celsius. The element with the lowest melting point is Te which melts at 449.5 degrees Celsius. ...
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Do there exist materials whose Opacity varies with temperature?
Do there exist materials whose Opacity varies with temperature?
E.g a Material that becomes more Opaque as it gets hotter?
- 2,908
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Why are less dense materials better thermal conductors?
As far as I understand a material is a better thermal conductor if its thermal diffusivity is higher. The thermal diffusivity is inversely proportional to density, thus denser materials have higher ...
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How hot can the focal point of a convex lens get under the full sun?
I could not find accurate data online apart from CSP power generators that could focus sun rays to a single point and heat a liquid to 1000°C.
I imagine many factors can affect the temperature, such ...
- 141
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1
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What factors determine the melting point of a substance?
What factors regulate how high or low melting points of different chemical elements are?
Given that the pressure is ambient, what are other factors to consider when choosing an element with a desired ...
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What is the meaning of $k_B T$? is there a maximum for it? [closed]
What is the meaning of $k_B T$? in physics, where $k_B$ is Boltzmann constant? Is there a maximum for it? Can you give a maximum or minimum value for it among all the material? Or is there any typical ...
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What are the applications of materials if their entropy increases with temperature? [closed]
What could be the possible applications of the materials if their entropy increases with increasing temperature.
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If we heat a 1Ly long copper stick through all its length to expand 1% what will be the relative speed of its two ends?
If we heat a 1Ly long copper stick through all its length to expand 1% what will be the relative speed of its two ends? If we, for example, heat up a copper stick by 600°C it will expand 1% so my ...
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7
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Speed of heat through an object
According to the Heat equation (the PDE), heat can travel infinitely fast, which doesn't seem right to me. So I was wondering, at what speed does heat actually propogate through an object?
For example,...
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Why does a bimetallic strip bend when heated?
This is a bimetallic strip:
When you heat the strip why doesn't this happen?(I know that the strips are somehow attached to one another and that probably has something to do with the bending. But I ...
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Does anything in an incandescent bulb actually reach its color temperature (say 2700 K)?
This question is inspired by a question about oven lightbulbs over on the DIY stack. It spawned a lengthy comment discussion about whether an incandescent lightbulb with a color temperature of 2500 K ...
- 573
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2
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How parker solar probe survives death rays?
What is the temperature due to death rays alone excluding plasma.
Clearly it's now possible for any material to survive that.
It's 20x closer than earth so radiation is 400x.
150million km / 7 million ...
- 39
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Current State of Research on high $T_c$ Superconductors
After looking at these two RevModPhys articles, I have found myself perplexed by the current state of high $T_c$ superconductivity research. Seeing as I cannot find any SE articles more recent than 5 ...
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Theoretical minimum temperature required to melt any material
Reading about this (New material has a higher melting point than any known substance) got me curious.
Given a pressure level (like 1 atm) and a sufficiently hot temperature, I have the intuition that ...
