The by-products of the refining of petroleum are separated based on which characteristic?

How does blood clotting prevent the entry of pathogens through cuts and wounds? answer asap,, this is due tomorrow. will mark as brainliest or whatever you call it : )

Ajet plane is speeding down the runway during takeoff. air resistance is not negligible. identify the forces on the jet.

Categorize them by metal, nonmetal, in periodic tableductilenon-ductilemalleableoften gain electrons easilygood conductorpoor conductorcan be liquidselements