Submitted by basafish t3_zvjgc7 in Futurology
Eur1sk0 t1_j1pn8ks wrote
Technological advances require energy. The upper limit is the max energy of the universe, provided we can harness it.
basafish OP t1_j1pob7t wrote
Isn't that practically limitless? I mean if we nuclear-fissioned Jupiter, we'd get all the energy we need for millions of years.
Eur1sk0 t1_j1pwylq wrote
Nope, nothing is "limitless" because a percentage of all energy conversions is converted to thermal energy which cannot be harnessed, it's lost as we say. That's why it's not possible to build a perpetual motion machine. There are thermodynamic restrictions.
Check Kardashev scale.
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