> Could you imagine, for example, measuring how fast you can fill up a car in miles/hour? No. First, an ICE car's fuel tank is filled up in a small fraction of

> Could you imagine, for example, measuring how fast you can fill up a car in miles/hour? No. First, an ICE car's fuel tank is filled up in a small fraction of an hour; "miles/minute" would be a more relevant unit. But more importantly, because the speed of fuel fill up depends only on the fuel station's pump, not on any engineering feature of the car itself.