Question

The density of brass is 8.4 gm per c.c, Explain the statement. Also explain how the volume will change with respecr to temperature incase of water.​

Answer 1

Answer:

The density of brass is 8.4 g/cm^3. What do you mean by this statement?

Ans]The density of Brass is 8.4 g/cm^3. This statement means that every 1 cm^3 of Brass has a mass of 8.4 g. It is because density equals mass per unit volume.

Also explain how the volume will change with respecr to temperature incase of water.​

Ans] We know that intermolecular force in molecules of liquid and gas is weak. Because of this reason when we increase the temperature the molecules start moving vigorously. This vigorous movement causes presence of less no. of molecules in per unit volume because of which Density decreases on increasing temperature in case of liquids and gases. But on Cooling them the molecules the molecules come closer and more molecules are present in per unit volume thereby increasing density. Thus, we can say that Density is inversely proportional to Temperature.

Answer 2

Answer:

This statement means one cubic centimeter volume of brass has a mass of 8.4 g.

Density is the mass of any material per unit volume. Gases always have much lower density than the condensed phases. Most materials have a lower density of the liquid than the solid but this isn't always true. Water has a higher density in the liquid state than the solid, so ice cubes float.

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