Answer:
A demand curve for a product with low elasticity appears to be steeper, because the quantity demanded doesn't change much, even if prices do. Products with low price elasticity are described as being inelastic
Explanation:
Because it is important to know the composition of the object
Density is the ratio of the mass of a sample to the volume occupied by that mass, and expresses how much mass there is per unit volume of a given portion of matter. Density is a physical property of extreme importance in the characterization, identification and use of substances or materials.