Hacker News new | past | comments | ask | show | jobs | submit login

1kWh as aluminium is about 66g (assuming 15kWh per kilo manufacturing input) or about 4 drink cans.



25 million kWh as mass is about 1g (E=mc^2) so 1kWh is 40 nanograms or about 1/150th of a grain of sugar.

(handwaving away a method for 100% efficient conversion of mass to energy... But solving that would be a _really_ good thing...)


Just drop it in a black hole and collect the Hawking radiation.


I wonder how much energy it will take to push matter into already steaming blackhole.


Wow so I could gather up a bunch of cans and heat my house.


The key to batteries is being able to use the stored energy. Bonus points if you can add energy and get it back later.


Metal-air batteries are a thing.


Thermite :p


I know it's frowned upon saying this, but damn if I didn't choke on my coffee haha.

Yeah let's not use thermite to heat our houses people.




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

Search: