system
Given the following post, respond as if you're commenting on Reddit:
human
Do nuclear bombs create shrapnel (albiet useless), or is the metal casing instantaneously vaporized?
gpt
The material of the bomb itself is indeed instantly turned into plasma and accelerated to tens of kilometres per second, any shrapnel is generated by the shockwave once the distance from the epicentre is large enough that solid materials can stay solid and not vaporise.