Which of the following statements is true?
unsaturated solutions will not dissolve more solute.
for most substances, the solid state is more dense than the liquid state.
density is not temperature dependent.
a nonpolar solute will dissolve in a polar solvent such as water.

The following statements are false:

Unsaturated solutions will not dissolve more solute.

Density is not temperature dependent.

A nonpolar solute will dissolve in a polar solvent such as water.

So that leaves the only true statement: For most substances, the solid state is more dense than the liquid state.

a and b sometimes have a positive value

r = ρ x length / area  

ρ = r x area / length  

ρ is in ohm-meters  

in basic units, it is m³kg/s³a²  

i think this is it.