what even are you talking about. it was obviously a mistake... they were using it to refer to energy lol. they obviously meant a joule. and this is a common mistake. the SPACEPLAN guy made the same mistake lol.
this is such unbelievable hedging. it's not that big a deal he made the mistake. and it wasn't that big a deal that i pointed it out so he could fix it. but hedging and pretending it's not a mistake.. well it was bad faith by the author and it's bad faith by you.