Khaled put a thermometer in a cup filled with hot water, why does the liquid rise inside the thermometer?

The liquid inside the thermometer rises due to its expansion by heat, which is known as thermal expansionSince it is one of the materials around us, and we deal with it in our daily lives, most of it expands with heat and contracts with cold, as thermal expansion generally occurs as a result of the high temperature surrounding the material; Which leads to a change in its size, due to the increase in the interfacial distances that exist between the particles of the material; As well as increasing its kinetic energy, which leads to an elongation of the material and an increase in its volume from normal when its temperature rises, in contrast to the contraction that occurs with cold when the temperature surrounding the material decreases; This leads to a decrease in the spacing and a decrease in the volume of the material

Khaled put a thermometer in a cup filled with hot water, why does the liquid rise inside the thermometer, as this phenomenon is observed with a large number of materials when exposed to heat, In the coming lines, we will talk about the answer to this question, and we will learn about the most important information about this phenomenon and how it occurs in detail

the answer :

The temperature of the water makes it expand.

The most famous examples of thermal expansion:

There are many examples that we see and apply, which is an application of the phenomenon of thermal expansion, Among the most famous of these examples are the following:

Electricity wires droop in the summer and increase in length from the normal length as a result of the high temperature in the summer, which leads to their expansion.
The volume of various metallic materials increases when heated or overheated.
Roads and bridges are stretched in the summer; Which leads to the appearance of cracks and fractures.
Car tires explode when exposed to high temperatures in the summer as a result of the expansion of the car