#### Topic Content:

- DensityDensity is the measurement of how tightly a material is packed together i.e. how closely the particles are packed in the material. The tighter the material is packed the more its... More Determination Using Direct Method
- Density Determination for Irregular Solids
- Relative Density and its Determination

### Density Determination Using Direct Method (Regular Solids):

Density is defined as mass per unit volume. The unity of density in metric units is kg/m^{3}.

The symbol for density is the Greek letter rho, \( \scriptsize (\rho) \)

Mathematically, it is given as:

**Density** = \( \frac{mass\:(m)}{volume \:(v)} \)

⇒ \(\scriptsize \rho = \normalsize \frac{mass \:(m)}{volume \:(v)} \)

**Mass (m)** = \( \scriptsize density \: (\rho) \: \times \: volume \: (v) \)

⇒ m = \( \scriptsize \rho \: \times \: v \)

and;

**Volume (v)** = \( \frac{mass\: (m)}{density \: (\rho)} \)

⇒ v = \( \frac{m}{\rho} \)

If the mass is expressed in gm and the volume in cm^{3}, then the unit of density is gm/cm^{3}. The mass of a regular object is determined by using a suitable weighing balance and the dimensions of the regular object are measured to determine its volume.

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