Question

3. Write few applications of contraction and expansion in our day to day activities ​​

Answer 1

Answer:

Engines of motor vehicles run when gases expand.

When making steel rims for wheels.

When the screw-cap of a bottle cannot be opened.

Answer 2

Answer:

Examples of expansion and contraction in daily life:-  

1) Engines of motor vehicles run when gases expand.  

2) When making steel rims for wheels.  

3) When the screw-cap of a bottle cannot be opened.  

Examples where it is necessary to allow for expansion and  

contraction :-  

A) When telephone wires are made, they are not pulled  

together tightly because on cold days they can contract and  

snap.  

B) Space is left between rails on a railway line so that the rails  

will not bend on a hot day.  

C) Oil and steam pipes are made with loops at certain places  

to provide for expansion and contraction of the pipes.

Explanation:

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