Definition of Density

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Density is defined as the ratio between mass and volume. In this series, we will learn to know what density is. And, why density is important  #fluid #fluidstatics #density

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00:00Hi colleagues, welcome to the Diggu Science channel.

00:05As the first in a series of fluid physics courses, we will learn about density.

00:11We have three solid cubes.

00:15A cube is a geometric figure that has the same length, width and height.

00:20The side lengths of these three cubes are the same.

00:24The volume of each cube is the same.

00:27Thus, these three cubes are cubes that have the same shape.

00:33Are these three cubes really the same?

00:39Note, when each cube is weighed on a mass balance,

00:43the value displayed on the screen turns out to show a different number.

00:50This means that each cube has a different mass.

00:52Some have a larger mass. Some have a smaller mass.

00:59So, actually, each cube is not the same.

01:03There is something inside the cube that makes it different.

01:07Something that makes up the cube is different.

01:13Let's look at the cube on a smaller scale.

01:16It turns out that it is true. The atoms that make up the cube are different.

01:22The types of atoms are different.

01:25Or, the same atom but with a different arrangement.

01:30We need to differentiate each of these cubes.

01:34Because the object has a different mass even though the shape is the same.

01:39Density is defined as the ratio of mass to volume.

01:45Density is often symbolized as rho.

01:48Rho is equal to m per way.

01:53So, density is a quantity.

01:56Density is a quantity of mass.

02:00Density is a quantity of volume.

02:03Density is a quantity of mass.

02:06So, density is a quantity that is formulated based on definition.

02:11We don't need complicated mathematical analysis to get this equation.

02:21Objects that have a greater density are generally composed of more atoms.

02:28This causes the vacuum inside the object to be narrower.

02:32That is why density is often referred to as density.

02:38We will study this in more detail in the next series.

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