Density,Mass, and Volume

Density, Mass and Volume
Density is the measure of how tightly the particles of a substance are packed into a given volume. L=1cm
B=1cm
H=1cm Aluminium=1cm3 Volume=lbh
Volume= 1cm*1cm*1cm
Volume= 1cm3

Iron 1cm3
1cm3 of iron would be however than 1 cm of aluminium. The density of the iron cube would be greater than the density of the aluminium cube. One explanation from that is that the particles/molecules in the iron cube are more tightly packed than the particles in the aluminium cube
The density of a particular substances is always the same, no matter how large or what shape the piece of substance is. For example, the density of lead is always 11.3 g/cm3
Density= Mass/Volume
Table showing densities of some common materials
Material
Density(g/cm3)
Gold
19.3
Mercury
13.6
Lead
11.3
Sliver
10.5
Aluminium
2.7
Rubber
1.1
Water
1.0
Cork
0.24
Air
0.0013

Measurement
Meaning
Symbol
S.I./Metric Unit
Density
This is a measure of how tightly the particles of a substance are packed into a given volume ρ g/cm3

Kg/m3
Volume
This is the amount of space that an object takes up occupies
V
Cm3
M3
Mass
This is the amount of particles which moves up an object
M
G
Kg

Formulae used for calculate density, mass and volume
1. Density(ρ)= Mass/Volume or ρ=M/V
2. Mass(M)= Density*Volume or M=ρv
3. Volume(V)= Mass/Density or V= m/ρ

Sample Questions
1. A metal block measure 10cm*2cm*2cm
a. What is the volume of the metal block?
V=length*width*height
V=lwh
V=10cm*2cm*2cm
V= 40cm3
b. How many blocks each measuring 2cm*2cm*2cm have the same volume as the larger metal block
V=lwh
V=2cm*2cm*2cm
V= 8cm3

40cm3/8cm3= 5small blocks has the same volume as one of the larger metal block