These two things seem to contradict each other. Yes magnets so lose a small fraction of magnetic moment alignment when opposing sides encounter each other, but it’s miniscule. What’s interesting to me is the force being opposed in the bike scenario is quite a lot, yet if it doesn’t heat the magnets then it feels like conservation of energy is broken. It must heat the magnets. Otherwise where does that energy go?
To push the bike back up when you get off. Like springs, those magnets should primarily store energy instead of dissipating it. If the energy was dissipated, the bike would sink over time and never bounce back up.
So in theory the magnets would heat when absorbing the force and cool when repelling each other. In theory you could press them together, generating a small amount of heat, let that heat dissipate through “regular means” (radnaint and conduction), then release the magnets and they should cool slightly lower than ambient temperature. With sensitive enough instruments, both events should be detectable.
That makes sense from the dipole movements, and it also makes sense that the temperature changes are almost down in the noise. And the amount of energy lost should also be down in the noise. If the bike goes up to the exact same place, there should be no noticeable net energy loss.
That has been prototyped before, and it gets crazier than what happens with just the magnets:
Yes, I fell down a rabbit hole.
It’s also 1:30 AM on my end and the neighbors finally quieted down.
I don’t know of any room temperature superconductors. Those materials need to be cooled to heartbreaking temperatures in order to behave as superconductors. Or potentially colder…