Definitions [5]
Define mass Mention its unit.
Mass is the amount of matter contained in a body. Its unit is a kilogram (kg).
Define the term density of a substance.
The density of a substance is defined as the mass of a unit volume of that substance.
`"Density" = "Mass"/"Volume"`
Define one metre, the S.I. unit of length. State it's one multiple and one submultiple.
One metre is defined as the distance travelled by light in the air in `1/(299,792,458)` of a second.
The S. I. unit of length is meter.
Multiple of metre = Kilometre (km).
Submultiple of metre = Centimetre (cm)
Definition: Weight
The weight of an object is defined as the force with which the earth attracts the object.
Definition: Mass
Mass is the amount of matter present in the object. The SI unit of mass is kg.
