Question

Can you suggest one more example in your daily life that uses the principle of expansion of solids?

Answer 1

Thermal expansion:

1. The term "thermal expansion" refers to a material's length, breadth, height, or volume change when its temperature is raised or lowered.
2. As atoms are closely packed, thermal expansion is clearly visible in solids.

Explanation:

1. The substances expand on heating and contract on cooling. If you heat a body, it alters its dimensions depending on the shape of the body.
2. The expansion that alters the length of the solid subs5tance is called linear expansion.
3. If we take a square tile and heat it, the expansion will be on two fronts, length and breadth, here it is called area expansion.
4. If we take a cube and heat it, all its sides expand and now the body experiences an increase in the overall volume due to this and it is called volume expansion.

The thermal expansion of solids has many applications in everyday life. For instance,

1. It will break if hot milk is poured into a thick-walled glass jar. There is no expansion at the outer surface.
2. The glass breaks due to uneven expansion in the container.
3. Thermometers are another example of an application of thermal expansion
4. In the case of the thermometer, the liquid is constrained to flow in only one direction that is along the tube due to changes in volume brought about by changes in temperature.