Coulomb used in a sentence

Coulomb in a sentence as a noun

But doesn't it have a hard time with coulomb friction, since you can only work with conservative fields/forces?

I mean, it seems more natural to think of amperes and coulombs per second rather than to define coulombs as the amount of charged carried by a 1 amp current in 1 second.

Usually for ion propulsion systems you throw off positive ions and also include a rear-facing electron gun. Don't know the exact details, but if it's throwing off neutral waters, with some proportion of charged waters, those charged waters will find their way back to satellite via coulomb forces, but the uncharged water propulsive component will still make a difference.