Capillary action of water

Capillary action of water

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Caption: Capillary action of water in glass tubes. This shows water rising in a narrow glass tube, relative to a wider glass tube. For mercury sinking relative to the outside level of mercury, see image A350/168. The relative rise or fall of a liquid in a narrow glass tube depends on whether the liquid is attracted or repelled by the glass. Water has a positive capillary rise and is drawn up a narrow glass tube. Mercury has a negative capillary rise and sinks down a narrow glass tube, relative to the outside level.

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Keywords: apparatus, capillary action, classroom, demonstrating, demonstration, educational, equipment, experiment, glass tube, instrument, laboratory, physical, physics, positive, rising, school, science, scientific, water

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