ICSE ICSE Class 8 - CISCE Question Bank Solutions for Physics

Name the type of energy (kinetic or potential) possessed by the following A bullet fired from a gun.

Name the type of energy (kinetic or potential) possessed by the following Water flowing in a river.

Name the type of energy (kinetic or potential) possessed by the following  A stretched rubber band.

Give an example to show the conversion of potential energy to kinetic energy when put in use.

Give reasons for the following Hammer drives a nail into the wood only when it is lifted up and then struck.

The potential energy of a body of mass 0.5 kg increases by 100 J when it is taken to the top of a tower from ground. If force of gravity on 1 kg is 10 N, what is the height of the tower?

A body of mass 60 kg is moving with a speed 50 m s_1. Find its kinetic energy.

A truck of mass 1000 kg, increases its speed from 36 km h^-1 to 72 km h^-1. Find the increase is its kinetic energy.

.............. is a process that involves direct conversion of a solid into its vapour on heating.

Describe the process of sublimation with examples.

What do you mean by sublimation? Explain with an example.

Why does the size of naphthalene balls decrease when left open?

Describe an experiment to demonstrate the process of sublimation.

Relative density of a substance is expressed in g cm-3.

A body experiences the same buoyant force while floating in water or alcohol.

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

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

A body while floating sinks deeper in a liquid of low density than in a liquid of high density.

The S.I. unit of density is ..........

The density of a body which sinks in water is ......... than 1000 Kg m^-3.