Question

3. Write few applications of contraction and expansion in our day to day activities ​
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Answer 1

Answer:

Applications of Expansion and Contraction

Expansion by heating can be used in several everyday activities. The jammed metal lid of a jam jar can be opened by heating. The jar is inverted and just the lid is dipped in hot water. After some time, the lid can be opened easily as the lid gets slightly expanded.

Answer 2

Answer:

snap. will not bend on a hot day. to provide for expansion and contraction of the pipes.

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• Engines of motor vehicles run when gases expand.
• When making steel rims for wheels.
• When the screw-cap of a bottle cannot be opened.