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Explain density with few examples

Dear Student
The mass density or density of a material is its mass per unit volume. The symbol most often used for density is ρ (the lower case Greek letter rho). Mathematically, density is defined as mass divided by volume:
 

ρ = m / V

where ρ is the density, m is the mass, and V is the volume. In some cases (for instance, in the United States oil and gas industry), density is also defined as its weight per unit volume, although this quantity is more properly called specific weight.

S.I. unit of Density = kg/m3 = kg m-3
Regards 

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density of a substance is its mass per unit volume examples of dense materials include iron leader Platinum density means that if you take two cubes of the same size made out of different materials and with them they usually wouldn't to get the same it also means that a cube of side perform can wait the same as 18 cube of LED
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Density is defined as a substance's mass per unit.
For eg. If the mass of water is 100 grams and it is using 10 cms space ,so, here as follows :
100/10 gcm-2 = 10gcm-2 (ans) here, gcm-2 refers to gram centimetre square (-2).
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