Andaroid:
I will measure it once I get home but what I want to do is just make it change the speed at which an led blinks as a beginners project
If it's a very low ohm pot(s) as used in L-pad circuits then it will pull too much current from your arduino's power source to be useful. If it's a 5k ohm or higher pot then it can be used to supply a variable voltage to a arduino analog input pin. However if it has a 'audio taper' then half a turn on the pot won't generate half the voltage output from the wiper pin, but that might not be a big deal for you.
Lefty