Explain why :(a) air is used to inflate tyres.(b) steel is used to make railway lines.


(a) When air (gas) is blown the particles in the air push the tyre walls from inside and exerts pressure on them.

(b) Steel (solid) is used to make railway lines because it is a rigid object having a definite shape and volume and strong also.

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Updated on: 10-Oct-2022

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