Density and Units conversion

Hey welcome back again! Today lesson would be slightly shorter. We would be learning about density and units conversion. So, enjoy!:D

What is density?
-Density describes the degree of compactness of a substance.
-Density is mass per unit volume
-The formula is: p=m/v

Example: Water sinks when water and oil are placed in a bottle. Why? It is because water is denser than oil but it is NOT heavier than oil.

Units conversions
On the previous lesson, you have learn that the importance of units and its conversion. Now, let us learn how to convert a unit to another unit example from one meter to centimeter.

Examples:

Since 1 kg = 1000 g and 100 cm = 1 m

1kg/1000g=1 100cm/1m=1

To express 15 mm in m:
Since 1 m = 1000 mm

1m/1000mm=1

Therefore: 15mm/1 x 1m/1000mm = 0.015m