Every story and comment from the Hacker News API, in a layout borrowed from 2001.
A comment on Giant 'sand battery' holds a week's heat for a whole town. Parent comment
That means that the hot middle of a sand pile stays hot, instead of advecting to the outside, where it cools by conduction.
There are no comments on this comment yet.
That means that the hot middle of a sand pile stays hot, instead of advecting to the outside, where it cools by conduction.