Question

Write in detail about three applications of expansion and contraction of matter.

Answer 1

Explanation:

I hope it's helpful to you

Answer 2

Answer:

$\huge \fbox \colorbox{lime}{꧁༺ǟռֆաɛʀ༻꧂}$

❄️ Expansion of Matters

️‍️

• Expansion in solids:- Railway tracks consist of two parallel metal rails joined together. Small gaps, called expansion gaps, are deliberately left between the rails as there is an expansion of the rails in hot weather

️‍️

• Expansion in liquids:- Water expands on heating. Try this with the help of an adult. Take a glass filled with water to its brim. Pour the water into a container and heat It (do not boil). Now try to pour the water back into the same glass. The water overflows.

️‍️

• Expansion in Gases:- If you keep an inflated balloon in the sun for some time, what will happen? It will grow in size as the air inside it expands on taking heat from the surroundings.

️‍️

️‍️

❄️Contraction of Matters

️‍️

• Contraction in solids:- If we hold a very hot glass tumbler under cold water, it cracks. This is because the outer surface of the glass comes in direct contact with cold water and contracts more as compared to the inner surface.

️‍️

• Contraction in liquids :- We observed that water expanded on heating. Can you say what will happen if the water is allowed to cool down and then poured back into the glass? Would it still overflow? No. This is because of contraction.

️‍️

• Contraction in Gases:- If an inflated balloon is tied at the mouth of a bottle and the bottle is placed in ice-cold water, what will happen? The balloon will shrink in size, as the air inside the balloon contracts on cooling.