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comment Intuitively, how can the work done on an object be equal to zero?
@annav, Thanks (+1) Yes, I know it is cold. It is supposed to have decoupled from the other components when the temperature of the universe was in the order of MeV and after that, it has no means of loosing energy by interacting with anything, it is only affected by the increase of volume due to the expansion (you surely know the details way much better than me). I erased the question because I was a bit ashamed, I realized it was very stupid. I even had assisted to a whole winter school about LCDM cosmology a few years ago. I don't know, I am tired, and mindlessly posed a stupid question.
Oct
28
comment Classical EM neglects electron recoil?
I'm sorry I use this unorthodox way to communicate with you. I erased my question about dark matter, because your comment made me remember and I realize how stupid the question was. But I wanted to tell you thanks for that comment. In fact, you are right about your guess. I even assisted to a whole winter school a few years ago about cdm. I have written that question in a weird moment of confusion, being tired.