Fill in the blanks:

(a) 1 kg is the mass of …………… mL of water at 4°C.

(b) Mass = density x …………… .

(c) The S.I. unit of density is …………… .

(d) Density of water is …………… kg m^-3.

(e) 1 g cm^-3 = …………… kg m^-3.

(f) The density of a body which sinks in water is …………… than 1000 kg m^-3.

(g) A body sinks in a liquid A, but floats in a liquid B. The density of liquid A is …………… than the density of liquid B.

(h) A body X sinks in water, but a body Y floats on water. The density of the body X is …………… than the density of body Y.

(i) The buoyant force experienced by a body when floating in salt-water is …………… that when floating in pure water.

(j) The weight of a body floating in a liquid is …………… .

Write true or false for each statement:

(a) Equal volumes of two different substances have equal masses.

(b) The density of a piece of brass will change by changing its size or shape.

(c) The density of a liquid decreases with increase in its temperature.

(d) Relative density of water is 1.0.

(e) Relative density of a substance is expressed in g cm^-3.

(f) When a body is immersed in a liquid, the buoyant force experienced by the body is equal to the volume of the liquid displaced by it.

(g) If a body floats in different liquids, different volumes of the body get submerged in different liquids, but in each liquid the weight of the liquid displaced by the submerged part of body remain the same.

(h) A body experiences the same buoyant force when it floats or sinks in water.

(i) A body floats in a liquid when its weight becomes equal to the weight of the liquid displaced by its submerged part.

(j) A body while floating, sinks deeper in a liquid of low density than in a liquid of high density.

Define the term density of a substance.

Name the S.I. unit of density. How is it related to g cm^-3.