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.
Chemistry is the branch of science which deals with the properties,  composition and the structure of matter. It also deals with  chemical reactions, changes in matter, and â¦ the principles which  govern these changes.In more simple terms it is about substances,  how they behave and how we can make new substances.hemistry is the science of atoms, molecules, crystals and other aggregates of matter and the chemical processes that change their energy and entropy levels as also their structure and composition.