Coolant [Spaceships]

[Anthony]

Originally Posted by Agemegos

The rocket equation does not apply to an electric car travelling along a highway with rolling resistance, aerodynamic drag, and a speed limit.

That's two separate issues. One is that the rocket equation only measures delta-V caused by the rocket, not from other sources, and the other is that vehicles that push on an external medium have variable performance based on speed relative to the medium they're pushing on.