RE: https://mastodon.xyz/@xkcd/117153917131631829
the hovertext sent me looking things up…
wikipedia says the planck unit of energy is about 2 GJ https://en.wikipedia.org/wiki/Planck_units
petrol is about 33 MJ/litre so 2 GJ corresponds to a 60 litre tank which is a fairly normal size for a car
Highway engineers like Planck units because, like the speed of light, the energy capacity of a typical car's gas tank is 1.
https://xkcd.com/3289/
