English Medium इयत्ता ९ - CBSE Question Bank Solutions

What type of motion is represented by the following graph ?

What type of motion is represented by the following graph ?

Write the common unit of density.

What is the density of water in SI units ?

What is the value of relative density of water ?

Why does ice float in water ?

The density of a body is 800 kg/m3. Will it sink or float when dipped in a bucket of water ? (Density of water = 1000 kg/m³).

Fill in the blank with suitable word :
A heavy ship floats in water because its....................density is less than that of water.

A mug full of water appears light as long as it is under water in the bucket than when it is outside water. Why ?

Explain why, big boulders can be moved easily by flood.

An iron nail sinks in water but it floats in mercury. Why ?

Explain why, a piece of glass sinks in water but it floats in mercury.

Steel sinks in water but a steel boat floats. Why ?

Why does a ship made of iron and steel float in water whereas a small piece of iron sinks in it ?

Name the force the upward push of water on a submerged object .

A beaker full of water is suspended from a spring balance. Will the reading of the balance change if a cork is placed in water ?

A beaker full of water is suspended from a spring balance. Will the reading of the balance change if a piece of heavy metal is placed in it ?
Give reasons for your answer.

A boy get into a floating boat .

What happens to the boat ?

A `1/2` kg sheet of tin sinks in water but if the same sheet is converted into a box or boat, it floats. Why?