You must maintain a safe following distance behind a vehicle you wish to pass.
Answer:
constant current
Explanation:
The curve of a constant current machine droops downward rather sharply and for this reason, this type of machine is called a "drooper."
Answer:
Explanation:
outside air must be mixed with return air at some point in time because here is an example a warm current of air comes in contact with a cold current of air the warm current has to cool down so it could mix with the cold current or if they don´t mix they would continue to bump into each other and probably cause a tornado. probably.
I am just questing to point a ok ok ok this might not be right