edit: I was very sleep deprived and my mind blanked out on the answer. Just find the voltage of the known resistor w/ the ohmemeter, and use ohm's law (i=v/r) to get the current, then use the current with the unknown r's voltage & ohm's law to get the resistance. Sorry to waste everyone's time.
I have an unknown resistor and a 1k resistor. I can only use a voltmeter, and I can place them in series. How would I go about finding the value of unknown resistor?
I have no idea where to even start with this- I have the voltage source (9v) but don't know what to do to find the rest. I suspect I have to get the current (as it is the same through all components) but I don't have the total resistance ( i=v/r) to get the current. If I calculate current with just the 1k resistor then it wouldn't be accurate.