Materials that allow water to pass | Porosity of Materials | Physics

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Published at : 16 Nov 2020
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The affinity that certain materials have for water divide their uses for human beings. Water - collecting it in some cases, and escaping it in other situations - is one of the oldest human pursuits, so materials like plastic that are not porous and do not allow water to pass, are used where containment is needed. Either water is to be held inside a container (i.e. a tank) or it needs to be held outside a certain periphery (i.e. a raincoat). This activity shows how cotton freely lets water pass through whereas umbrella cloth and plastic do not. The materials that let water through are termed as "porous" while the ones that don't let water through are termed "non-porous'. We use these non-porous materials to protect a wide range of things - electronic equipment, grain stores, or simply our bodies.
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