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.
Why Life Is Physics, Not Chemistry. The idea that life boils down to chemistry is being usurped by a much more ambitious idea, says two of the worldâs leading biophysicists. In the history of science, there are many examples of simple changes in perspective that lead to profound insights into the nature of the cosmos.