how to study thermals expansion
Answers
Imagine yourself in an open space, chairs laid out in a certain area. All the chairs fill up,and everyone sits side by side. Everyone coexists in a very harmonious way, occupying that set space. Now imagine a skunk popping up from underneath the chair right squat in the middle. What's going to happen? You guessed it, everyone is going to jump out of the chair and scatter everywhere! The crowd will expand.
This is very much what thermal expansion is all about. At a certain temperature, atoms within a material are going to occupy a set space. This set space defines the boundaries of that material. Atoms are in constant motion, bouncing off of each other, but at that specific temperature they are moving and bouncing against each other in that set space. When you heat that material, the atoms get agitated. They move faster. The hotter the temperature, the faster they move. They start bouncing off of each other more frequently and with more force. They start to need more space to coexist in, and they get it. They expand the space they exist in; expand the boundaries of the material they make up. What ends up happening is the material itself expands.
Solids, liquids and gasses all expand when they are heated. Different materials expand at different rates although a general rule of thumb is that liquids and gasses expand at higher rates than solids.
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