5 Apr
2022
5 Apr
'22
8:28 p.m.
On 5/04/22 6:05 am, Ethan Furman wrote:
It seems to me that these "unitless' units actually have units, even if they *appear* to cancel each other out.
I think it's more that units alone don't capture everything that's important about the physical situation. Another example: the capacitance of a capacitor is the area of the plates divided by the distance between them and multiplied by a constant. Unit-wise, an area divided by a length is just a length, so the constant has units of farads per metre. But the metres don't correspond to a length you can measure anywhere. -- Greg