this post was submitted on 09 Oct 2024
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Scientists Simulate Alien Civilizations, Find They Keep Dying From Climate Change (futurism.com)
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[โ€“] YeetPics@mander.xyz -2 points 1 month ago (1 children)

Nothing in the universe has an efficiency over 100%.

[โ€“] CanadaPlus@lemmy.sdf.org 2 points 1 month ago* (last edited 1 month ago)

Depends how you define it. Heat exchangers do, because it's defined for them in terms of heat moved per heat generated. All conservation laws are still respected.