Problem description:

Formula ... Theorem ...

Analysis:

The main unit of mass is kilogram and the main unit of volume is cubic meter, so the mass of 1 cubic meter is taken as the density of the substance.

The density of water is 1.0× 10.3 kg/m3.

density

Density: The mass per unit volume of a substance is called the density of this substance.

ρ denotes density, m denotes mass, v denotes volume,

The formula for calculating density is

ρ= m/V；

The unit of density is kg/m3 (also called g/cm3),1g/cm3 =1000kg/m3;

The unit of mass m is: kg; The unit of volume v is m 3.

Density is a characteristic of matter, and the density of different kinds of matter is generally different.