The solid body has defined size and volumes, right? What can happen to a solid body after heating it? What is volumetric dilation?
Index
Before we know how the volumetric dilation, let's take a quick look at the others for you to understand better:
The body gains the size of thermal expansion when. your body increases due to its heating, by the rise of its temperature.
This shakes the molecules in this body, which increases the distance between them. In gases, the expansion occurs more importantly, intermediate in liquids and less evident in solid bodies.
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Linear dilation works on the length of the body. solid. A railroad rail bar, for example, is made using. linear dilation.
There must be spaces between them so that the bar does not run. the risk of bending or sagging due to the cooling of the. temperature after.
Linear dilation is theoretical as it is not a phenomenon. visible because it depends on the material and temperature applied to the body.
Matter has the physical law of expanding into three. dimensions. But since there is no way to calculate this, only the calculation of is done. linear dilation.
To understand the expansion of emptiness, let's have a way. example a blade or iron plate with a hole in the middle.
As we've already seen, when the body's molecules are heated they move away from each other. Therefore, the edges of the hole in this sheet must also be spaced apart.
As the only body where this can occur is in the plate, this hole must have its size increased. It concludes that space. emptiness has its increase equally if it were filled.
Surface expansion works in two dimensions: the length and width of the solid body.
If this same plate that we used in the example above is. heated and dilate, both the plate and the hole size expand equally, increasing in two dimensions.
The anomalous expansion of water differs from all others. other substances because its volume increases when heated instead of. increase. Its volume is decreased when it reaches 4º C.
This anomaly happens as follows in winter: the density of water increases when its temperature decreases. This causes a. heated water rises and the colder water descends, forming a current upwards and stops. low.
When the water as a whole is at 4º C, these flow. currents stops, so that with the water accumulated at the bottom it does not rise and the bank. in no way go down.
The water density is maximum, facilitating the occurrence. of this phenomenon. Ice is an excellent thermal insulator. On top it can be. frozen, further below, the water remains in its liquid state.
This provides life for even aquatic animals. during periods of very cold weather.
Now that you understand the above dilations, let's go to. that matters. THE volumetric dilation it happens in three dimensions like that. like linear dilation. Increases in volume, height and body width.
And as stated above, bodies when heated. their space increases and the body necessarily expands.
Dilating solids and liquids
The dilation must be calculated considering the. coefficient of the materials involved.
In case of thermal expansion in liquids, it is. It is necessary that this experiment be done in a solid container, considering. obviously we were not able to measure it.
It is thermal expansion of liquids is greater than the expansion of solid bodies. It is certain that a container almost full of water overflows after its temperature rises. The water that overflows in the volumetric dilation here it is called apparent dilation, this corresponds to: volumetric dilation = apparent expansion + solid expansion.
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