a spherical shape of liquid drops :
surface tension chalk blots ink:
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➡ Water drops, or, for that matter, the drops of any other liquid, are spherical in shape due to a phenomenon called surface tension. In a liquid this acts on the surface of a freely falling drop to minimise its area.
➡These phenomena occur due to capillary action. The ink rises up in the capillaries found within a piece of chalk, i.e. the nooks and crevices in the structure of a piece of chalk.
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A spherical shape of liquid drops:surface tension chalk blots ink: capillary action
- The surface tension of water, which is generated by the tendency of water molecules to adhere together causes the raindrops to take on a spherical shape.
- This happens because the spherical shape has the smallest feasible surface area, it can withstand any external force in the atmosphere.
- Capillary action causes the phenomenon of chalk blotting ink. The ink rises through the capillaries in a piece of chalk, which are in the form of spaces in the structure of the chalk.
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