Physics Quiz on Density

A cube has a mass of 30 kg, If the volume of the cube is 0.02 m³,

what is its density?

• 1500kg/m³

• 150kg/m³

• 0.6kg/m³

• 50kg/m³

The density of iron is 7.874 g/cm³.What is this value in kilograms per cubic meter?

liquid of mass 50 gm is put in a container where its mass became 80 gm, And after evacuating the container and refilling it with water its mass Became 60 gm,

find the density of the liquid

density of water is 1g/cm³

• 0.16g/cm³

• 1.6g/cm³

• 160g/cm³

• 1600g/cm³

Fluids include ........................

• a) Liquids only.

• b) gases only.

• c) Solids only

• d) gases and liquid

A glass is full of iced water till its rim, as Ice melts......

• a) Water level decreases slightly

• b) Water level increases and water poured out.

• c) Water level stays the same

• d) Water mass decreases.

Substance (A) has a density of 3g/cm³ and substance (B) has a density of 4 g/cm³. To obtain equal masses of these two substances, what must be the ratio of the volume of A to the volume of B?

• a) 3:4

• b) 4:3

• c)1:1

• d) √3∶2

A student wishes to determine the density of an irregularly shaped stone. First, he finds the mass of the stone. Next, he lowers the stone into a measuring cylinder containing water.

The diagrams show the measuring cylinder before and after the stone is lowered. How should the student calculate the density of the stone?

• A) mass of stone × reading 2

• B) mass of stone × (reading 2 – reading 1)

• C) mass of stone ÷ reading 2

• D) mass of stone ÷ (reading 2 – reading 1)

The shown graph represents the relation between mass and volume for different pieces of metal. Find which metal could be the one being measured in this graph. Using the standard metal-density chart.

• a) Aluminum

• b) Nickel

• c) Tin

• d) Silver

Two liquids of densities 2.5 g/cm³ and 0.8 g/cm³ are mixed in the ratio of their masses as 2:3 respectively. Find the average density of the mixture.

• a)1.4 g/cm3

• b)1.1 g/cm3

• c)1.65 g/cm3

• d)1.7 g/cm3

How many grams of ethanol (density 0.80 g/cm3) should be added to 5.0 g of chloroform (density 1.5 g/cm3) if the resulting mixture is to have a density of 1.2 g/cm3? Assume that the fluids do not change their volumes when they are mixed.

• a) 1.8 g

• b) 4.4 g

• c) 2.4 g

• d) 2 g