(English Medium) ICSE Class 9 - CISCE Question Bank Solutions for Physics

A solid of density 5000 kg m^-3 weighs 0.5 kgf in air. It is completely immersed in water of density 1000 kg m^-3. Calculate the apparent weight of the solid in water. 

A metal cube of edge 5 cm and density 9 g cm^-3 is suspended by a thread so as to be completely immersed in a liquid of density 1.2 g cm^-3. Find the tension in thread. (Take g = 10 m s^-2) 

How are the (i) Mass, (ii) Volume and (iii) Density of a metallic piece affected, if at all, with an increase in temperature?

Complete the following sentence.

S.I. unit of density is .......... .

Complete the following sentence.

Density in kg m^-3 =  ............ × density in g cm^-3

A body weighs W₁gf in air and when immersed in a liquid it weighs W₂gf, while it weights W₃gf on immersing it in water. Find:

1. volume of the body
2. upthrust due to liquid
3. relative density of the solid
4. relative density of the liquid

Relative density of a substance is expressed by comparing the density of that substance with the density of : 

The unit of relative density is : 

A piece of stone of mass 15.1 g is first immersed in a liquid and it weighs 10.9 gf. Then on immersing the piece of stone in water, it weighs 9.7 gf. Calculate:

1. The weight of the piece of stone in air,
2. The volume of the piece of stone,
3. The relative density of stone,
4. The relative density of the liquid.

A body weighs 20 gf in air and 18.0 gf in water. Calculate the relative density of the material of the body. 

A solid weighs 120 gf in air and and 105 gf when it is completely immersed in water. Calculate the relative density of solid. 

A solid weighs 32 gf in air and 28.8 gf in water. Find: (i) The volume of solid, (ii) R.D. of solid and (iii) The weight of solid in a liquid of density 0.9 g cm^-3.