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Explain the term Density. |
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Answer» 0.5 kg of cotton occupies more space than 0.5 kg of iron. The particles of iron are closely packed while that of cotton is loosely packed. The amount of iron packed in a unit volume is more. This explains as to why iron is heavier than the same volume of cotton. In Physics, we describe the lightness or heaviness of different substances by using the word density. The density of a substance is defined as the mass of the substance per unit volume. Density = mass of the substance/volume of the substance D = M/v. Where, 'D' represents the density, 'M' mass and 'V' volume. SI unit of density is kg/m3. The density of a substance remains the same under certain specified conditions. Thus the density of a substance is one of its characteristic properties and this property can be used to determine the purity of any substance. |
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