Question

How do you find the mass, volume, and density of an object, and what formulas and Sl units are used for each? Would equal volumes of two different substances have the same or different masses? Why?

Answer 1

Density of a substance is defined as the ratio of mass and volume. M is used to denote mass of the substance, V is used to denote the volume of a substance.

Complete step by step answer:
- If we talk about mass, mass is just the amount of solid substance we have. The SI unit of mass is Kg.
- Volume is the amount of liquid substance we have. The SI unit of volume is ${{m}^{3}}$
The density of a substance is defined as the ratio of mass by volume. We know the unit of mass is Kg and the unit of volume is ${{m}^{3}}$. Hence, the SI unit of density is Kg${{m}^{-3}}$. The formula use to calculate density is mentioned below:
$density=\dfrac{M}{V}$
Where M is the mass of the substance and,
V is the volume of the substance
- It is possible for two substances to have equal volume but the mass of the substances will be different, which depends upon their densities.

Note: We can use the formula of density to calculate the value of mass of substance and volume of substance, if the value of other two quantities is given. For example, if the value of density and volume of the substance is given, then we can calculate the mass of substance by multiplying the value of density of the substance by the volume of the substance.