Answer:
go on google and type NCEER book answers
Brake system
Explanation: the engine doesn’t need to be running to make the brake system work the brake system it’s independent
In order to understand a monomer let´s first see the structure of a polymer. As an example, in the first figure polyethylene (or polyethene) is shown. This polymer, like every other one, is composed of many repeated subunits, these subunits are called monomer. In the second figure, polyethylene's monomer is shown.