Question

III. Answer the following 3 x 3= 9 M
1. The density of water is 1 g/cm3. If each of these liquids X, Y and Z is immiscible in water.
Liquid Mass (g) Volume (cm3) X 5.4 5
Y 46 50
Z 130 100
Which of them will a) float on water b) sink in water

Answer 1

Answer:

Density: The density of a substance is defined as the mass per unit volume,[D= \frac { M }{ V } ]

Here, D = Density of the body

M = Mass of the body

V = Volume of the body.

S.I. unit of density = Kgm-3 or Kg/m-3

c.g.s. unit of density = g/cm-3 or g cm-3

Floating bodies: The density of water is 1 g/cm3 (c.g.s. system) and 1000 kg/m3 (S.I. system).

Case (a) If the density of a body is more than 1 g/cm3 or 1000 kg/m3 then the body will sink in water.

Case (b) If the density of a body is less than 1 g/cm3 or 1000 kg/m3 then the body will float on water.

Case (c) If the density of a body is same i.e. 1 g/cm3 or 1000 kg/m3 then the body will half float and half submerge in water.

Explanation:

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