Relative Density

IMPORTANT

Relative Density: Overview

This topic covers concepts, such as, Relative Density of an Object & Unit of Relative Density of an Object etc.

Important Questions on Relative Density

EASY
IMPORTANT

Madhu noted following observations in her notebook:
(i) Weight of the stone in the air =272 gwt
(ii) Weight of the stone in water =192 gwt
(iii) Weight of the stone in salt solution =176 gwt
The relative density of the salt solution is

MEDIUM
IMPORTANT

What is the unit of relative density? A sealed packet of 500 g has volume 350 cm3. Will it float or sink in water density of water=1 g/cm3. Find the mass of water displaced by the packet.

MEDIUM
IMPORTANT

Define relative density. Relative density of silver is 10.8. Find its density in SI unit if density of water is 1000 kg/m3.

HARD
IMPORTANT

Find the relative density of a block which floats with 2/3rd of its volume immersed in water.

EASY
IMPORTANT

Relative density of a substance which loses 2 N weight when immersed water is 6.4.  Find the weight of substance in air.

EASY
IMPORTANT

A solid weighs 80 g in air and 64 g in water.  When kept in water, state whether the object would float or sink.

MEDIUM
IMPORTANT

A solid weighs 80 g in air and 64 g in water. Calculate its relative density.

EASY
IMPORTANT

Define relative density, State its mathematical formula.

EASY
IMPORTANT

Density of silver is 10.8×103 kg/m3. Calculate the relative density of silver if density of water is 103 kg/m3.

EASY
IMPORTANT

Define relative density. State its SI unit.

MEDIUM
IMPORTANT

Density of turpentine at 293 K is 870 kg m-3. Identify and write the names of substances that sink in it at same temperature.

S. No. Substances Density kg m-3

1

2

3

4

5

6

Wood

Ice

Rubber

Paraffin wax

Cork

Bone

690

920

970

900

240

1850

 

MEDIUM
IMPORTANT

The dimensions of a wooden block are 2 m×0.25 m×0.10 m. If relative density of wood is 0.6, calculate the mass of block in kg. Density of water =1002 kg m-3.

EASY
IMPORTANT

The following figure shows three identical blocks of wood floating in three different liquids A, B and C of density d1, d2 and d3 respectively. Which of these has the highest density? Give reason to justify your answer.

Question Image

 

MEDIUM
IMPORTANT

Relative densities of two substances A and B are 2.5 and 0.9 respectively. Find densities A and B. Also find whether they will sink or float on water. Density of water=1000 kg m-3.

MEDIUM
IMPORTANT

A body floats on surface of water with one-third of its volume 'V' immersed in it. What is its relative density?

EASY
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Relative density of an oil is 0.8. Will it float or sink in water?

EASY
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Relative density of silver is 10.5. Find its density in SI units.

MEDIUM
IMPORTANT

Relative density of aluminium is 2.7. Explain this statement.

EASY
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How is relative density of a substance related to Archimedes 'principle'?

EASY
IMPORTANT

Define relative density.