I recently thought about time.
And I know from my days in school, that a second is determined by the radiation of Caesium-133. But I also know, that the duration of a second depends of where you measure it...like on a planet with a huge mass traveling very fast OR on a planet with low mass...
The first calculation is simply a voltage divider where you can determine the resulting resistance after puting the voltmeter across R1 => Rx.
Then take Rx and calculate back using the formula you use when you have two resistors in parallel and want to know the total resistance.
you don't need...