When the computer receives a rich signal (high voltage) from the O2 sensor, it leans the fuel mixture to reduce the sensor's reading. When the O2 sensor reading goes lean (low voltage), the computer reverses again making the fuel mixture go rich.
Chemistry and physics are branches of science that both study matter. The difference between the two lies in their scope and approach. Chemists and physicists are trained differently, and they have different professional roles, even when working in a team.
Answers. Relevance. Rating Newest Oldest. Best Answer: Historically chemistry has been a physical science, and in universities where physical sciences are in a different college or school from biological sciences, you will often see chemistry grouped with physics, not biology.