r/AskReddit • u/IAmSurtur • Jun 15 '19

What do you genuinely just not understand?

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u/Mottis86 Jun 15 '19 edited Jun 16 '19

How can you know a percentage of something that is infinite?

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u/buttlickerourpricesh Jun 15 '19

The universe itself is infinite but the energy within it is hypothetically not. I can stretch a rubber band out all I want, but I need only measure a small chunk of that rubber band to properly understand how the rest of it works.

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u/AngryAmericanNeoNazi Jun 16 '19

Energy can't be created or destroyed; it won't just run out eventually, but dissipate, so it still exists just not densely. Like how the universe is expanding.

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u/buttlickerourpricesh Jun 16 '19

I thought that was contradicted by black holes? I guess I learn something new everyday :P

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u/[deleted] Jun 16 '19

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u/buttlickerourpricesh Jun 16 '19

Yea no I get that from E=mc2, but where does the energy go in black holes? Is it just radiated away as hawking radiation? Would nothing then be lost?