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

A bimetal strip is shown in the below diagram before heating. Draw a diagram to show how it bends on heating and on cooling.

A bimetal strip is shown in the below diagram before heating. Draw a diagram to show how it bends on heating and on cooling.

Distinguish between real and virtual image.

Explain the following:

Why does not a Pyrex tumbler crack when hot water is poured in it?

A round bottom flask containing coloured water, filtered with a stopper and a narrow glass tube is shown in the following diagram. What will happen to the water level X marked in the tube when it is placed in a hot water bath? Give a reason for your answer.

Give reasons for the following:

When boiling water is poured into a glass bottle, it generally cracks.

Distinguish between uniform velocity and variable velocity.

The S.I. unit of velocity is ___________

Define Velocity.

What are the SI units of velocity?

A body goes from P to Q with a uniform speed of u and immediately returns back to P at a uniform speed of v. what is the average velocity for the whole journey?

What is meant by a constant velocity? Is it same as uniform velocity?

What kind of a velocity does a flying bird most likely to have?
(a) Uniform velocity, or
(b) Non- uniform velocity.

Define angular velocity

When a body said to have a uniform velocity?

A stone is dropped from a certain height. Is its motion uniform or non-uniform?

What is the velocity of a stone thrown vertically upwards at its maximum height?

What is the relation between linear velocity and linear speed?

During circular motion, which physical quantity of the body:
 Changes continuously

An artificial satellite is moving in a circular orbit of radius nearly 42,250 km. Calculate its linear velocity, if it takes 24 hours to revolve round the earth