Question

Fill in the blanks. 1. The density of a substance is the ratio of its and volume. 2. The density of liquids is more than that of 3. The of a substance is the ratio of its density to the density of water at 4°C. in/on water. 4. On cooling, the density of gas 5. A body of density 3.5 g/cm will 6. On multiplying the relative density by substance in kg/m² one gets the density of a​

Answer 1

A   Mass

B    The density of a liquid is a measure of how heavy it is for the amount measured. If you weigh equal amounts or volumes of two different liquids, the liquid that weighs more is more dense. If a liquid that is less dense than water is gently added to the surface of the water, it will float on the water.

C    Specific gravity, also called relative density, ratio of the density of a substance to that of a standard substance. The usual standard of comparison for solids and liquids is water at 4 °C (39.2 °F), which has a density of 1.0 kg per litre (62.4 pounds per cubic foot).

D    When a liquid or gas is heated, the molecules move faster, bump into each other, and spread apart. ... The opposite occurs when a liquid or gas is cooled. The molecules move more slowly and take up less space. Therefore temperature can affect density.

E    False, A body of density 3.5 g/cm³ will not float on water because any object/body which has density more than 1g/cm³ will sink in water.

F   The relative density of a substance is the ratio of its density to the density of water at 4°C. On multiplying the relative density by 1000, one gets the density of a substance in kg/m3. A body of density 3.5 g/cm3 will float on water.

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