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xkcd #3033: Origami Black Hole (xkcd.com)

submitted 3 days ago by [email protected] to c/xkcd

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You may notice the first half of these instructions are similar to the instructions for a working nuclear fusion device. After the first few dozen steps, be sure to press down firmly and fold quickly to overcome fusion pressure.

https://explainxkcd.com/3033/

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[–] reattach 6 points 3 days ago* (last edited 3 days ago) (1 children)

I think your conversion is off. There's 4,184 joules per gram of TNT, not per ton (https://en.m.wikipedia.org/wiki/TNT_equivalent). Your calculation is off by six orders of magnitude. The first poster's calculation is correct.

[–] [email protected] 4 points 3 days ago

Oh damn I think I read this:

The ton of TNT is a unit of energy defined by convention to be 4.184 gigajoules (1 gigacalorie),[1] which is the approximate energy released in the detonation of a metric ton (1,000 kilograms) of TNT.

And immediately brain farted "gigajoule" to "kilojoule." Thanks!