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Surface tension is the tendency of liquid surfaces at rest to shrink into the minimum surface area possible. Surface tension is what allows objects with a higher density than water such as razor blades and insects (e.g. water striders) to float on a water surface without becoming even partly submerged.
A concave meniscus occurs when the attraction between the particles of the liquid and the container is more than half the attraction of the particles of the liquid to each other , causing the liquid to climb the walls of the container (see Surface tension § Causes). This occurs between water and glass.
Drop of water bouncing on a water surface subject to vibrations Surface tension prevents water droplet from being cut by a hydrophobic knife. Liquid forms drops because it exhibits surface tension. [1] A simple way to form a drop is to allow liquid to flow slowly from the lower end of a vertical tube of small diameter.
Surface tension prevents the clip from submerging and the water from overflowing the glass edges. Temperature dependence of the surface tension of pure water. Water has an unusually high surface tension of 71.99 mN/m at 25 °C [64] which is caused by the strength of the hydrogen bonding between water molecules. [65] This allows insects to walk ...
The effect is a consequence of the fact that alcohol has a lower surface tension and higher volatility than water. The water/alcohol solution rises up the surface of the glass lowering the surface energy of the glass. Alcohol evaporates from the film leaving behind liquid with a higher surface tension (more water, less alcohol).
Zisman termed the intercept of these lines when cos θ = 1 as the critical surface tension (γ c) of that surface. This critical surface tension is an important parameter because it is a characteristic of only the solid. Knowing the critical surface tension of a solid, it is possible to predict the wettability of the surface. [7]
Surface tension causes the liquid silk to break into the sticky droplets. ... In common with spiders, some insects also use silk to catch prey, and caddisflies actually spin webs under water! Also ...
Water potential is the potential energy of water per unit volume relative to pure water in reference conditions. Water potential quantifies the tendency of water to move from one area to another due to osmosis , gravity , mechanical pressure and matrix effects such as capillary action (which is caused by surface tension ).