the 4 resistor wired in series is equal to 0.639 ohms
"Describing how copper changes color in chlorine" is the answer I think is right. Hope this helped!
Answer:
a basis or standard for evaluation, assessment, or comparison; a criterion.
Explanation:
Definition of reference point. : something that is used to judge or understand something else The professor used the study as a reference point for evaluating and discussing other theories.