Question

What is mass?

Answer 1

Mass it the amount of matter in an object. while density is a measure of the tightness of the molecules packed in an object.
mass is given by the relation: `m=F/a`
density is given by: `rho=m/V` where `rho` is the greek letter rho and is used to denote density.
Mass has the Si units `Kg` while density is measured in `Kgm^3`