What should be correct considerations for the density of an object -mass or weight by volume?
Density, mass, and volume are all properties OF THE OBJECT, and never change unless the object changes or the thermodynamic conditions of the object change. Density is mass per unit volume, not weight per unit volume Only weight changes when you measure objects at the poles, equator, moon, etcetera. Also, do realize, gravity “cancels out” of the equation which “decides” float or sink. All that matters is the density. Review your definitions: Mass: the amount of material in an object, or a quantitative measure of an object’s linear translational inertia. Volume: the amount of space occupied by an object or a geometric idea in 3-d space. Density: the ratio of mass to volume Weight: by definition#1, the pull of gravity on an object. By definition#2, the net-non-gravitational force constraining an object at rest in its immediate environment.
