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Heating and cooling are rarely nicely split up in time. While you're heating something it is also cooling and while you're cooling something it is also warming up. This usually limits your ability to heat something up or to cool it because at some point these two are in balance.
No. Put a cold thing into something hotter and the thing will heat up without cooling.
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the hot thing will get cooler. like to make something clean, you have to make something else dirty.
Is that true though? If I have say a box with mixed red and blue bricks and I sort them by color, both sides are "clean" now.
If either red or blue were dirt, one of the sides is dirty, and the other is clean.
If neither red or blue were dirt, then nothing was dirty, it was just mixed up.
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No. Put a cold thing into something hotter and the thing will heat up without cooling.
No. The outer layer of the hot thing will quickly heat up to the temperature of the hot medium, then it will cool down as is stays in contact with the middle layer, which will heat up itself. The same thing repeats in layers all over the object.
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They experimentally demonstrated that it takes significantly more energy to move a microparticle the same distance when cooled than the amount of energy it would take when heated.
How can that be possible, though?
That's easier than having to provide all the energy to do the movement directly.
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How can that be possible, though?
If something is already bumping around randomly, all you need to do is constrain the bumping along some dimensions and it will move less randomly and more frequently toward the remaining free dimensions. That's easier than having to provide all the energy to do the movement directly.
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Meh, if self-assembling, self-repairing materials forming a swarm of nano bots was going to take over the world it would have already happened elsewhere in the universe and proliferated everywhere by now. instead we have biology. The actual dominate force in our dimension that did proliferate.
Do you have any evidence that us biologicals are not an outlier other than the anthropic principle? Maybe our solar system is in the machines’ nature preserve sector.
Our “dimension” the one unique to our perception and interpretation on Earth is dominated by biology.
I don’t see an artificial system being able to sustain a supply chain long enough to defeat that. The supply chain of biology is inherit.
I always feel a little stupid or strange reading a lot of these science headlines and introductions. I wasn't aware that people considered there to be a symmetry between heating and cooling. I thought that the entire point of thermodynamics is that they are asymmetric. Even the article mentions that it's been known that heating is more efficient than cooling.
Given that cooling is effectively just heating something else, I’m a little surprised.
The symmetry between cooling and heating is only a linearization approximation, like also the symmetry between compression and expansion.
There is no surprise that there are scenarios when the approximations deviate too much from the actual behavior and cooling and heating are asymmetric (and also compression and expansion).
I always feel a little stupid or strange reading a lot of these science headlines and introductions. I wasn't aware that people considered there to be a symmetry between heating and cooling. I thought that the entire point of thermodynamics is that they are asymmetric. Even the article mentions that it's been known that heating is more efficient than cooling.