This means that any instrument is calibrated for a specific liquid, usually water. When a tube of a narrow bore, often called a capillary tube, is dipped into a liquid and the liquid wets the tube (with zero contact angle), the liquid surface inside the tube forms a concave meniscus, which is a virtually spherical surface having the same radius, r, as the inside of the tube. Why does water forms upward meniscus in glass tube but mercury forms a If you were take that same glass beaker, instead of filling it with water if you filled it with say, mercury. Direct link to Ivana - Science trainee's post First: the chemical compo, Posted 7 years ago. Secure .gov websites use HTTPS why it is going to be more attracted to the glass than itself, because glass actually has, the molecules in glass thinnest blood vessels, those are very, very, very, very thin. Instead, the top is curved inward, making it a little difficult to decide exactly where to read the volume. The Different Meanings of Meniscus in Science. The water rises up its tube and forms a concave meniscus at top. Water has hydrogen bonding.what about mercury?does mercury repel glass tube?what is the force which makes mercury have more cohesive nature than adhesive nature? Water-based fluids like sap, honey, and milk also have a concave meniscus in glass or other wettable containers. that looks like this where there's a bulge near the center when you're further A concave meniscus occurs when the molecules of the liquid are more strongly attracted to the container than to each other. Most liquids, including water, present a concave meniscus. A meniscus is a fibrocartilaginous tissue. 4 ). In a contact angle measurement, the shape of the menisci is measured with a balance or optically with a digital camera. the small little gaps of the paper towel, but There are no media in the current basket. Thus, the meniscus will be of concave shape. molecule gets attracted to it because of its hydrogen bonds. The extent of the rise (or fall) is directly proportional to the surface tension of the liquid and inversely proportional to the density of the liquid and the radius of the tube. concave, concave meniscus. Mercury shows a convex meniscus (the centre is higher than the edges), because internal cohesive forces are stronger than the force between the glass wall and the metal.

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