The density
of a substance is the total mass (m) of that substance
divided by the total volume (V) occupied by that substance
(mass per unit volume). It has units of pound-mass percubic feet (lbm/ft3).
The density of a
substance is the reciprocal of its specific volume (n).
of a substance is the total mass (m) of that substance
divided by the total volume (V) occupied by that substance
(mass per unit volume). It has units of pound-mass percubic feet (lbm/ft3).
The density 
of a
substance is the reciprocal of its specific volume (n). 
