And you get all of that energy back when you powder that aluminium, mix it with ... | Hacker News

Hacker Newsnew | past | comments | ask | show | jobs | submit

		at_a_remove 11 months ago \| parent \| context \| favorite \| on: What are these bumps on the top of a pull-tab can? And you get all of that energy back when you powder that aluminium, mix it with rust, and manage (with difficulty) to ignite it.

throwawaymobule 11 months ago [–]

No you don't. There are losses from inefficiency at every step.

Guidelines | FAQ | Lists | API | Security | Legal | Apply to YC | Contact