It is because of the surface tension and cohesian of the molecules. It can be concave or convex.
You measure from the bottom curve of the meniscus.
Do you mean is a meniscus always concave? If so, then no. For example, the meniscus of mercury is convex.
No, the meniscus is not the same height for every liquid. The curvature of the meniscus depends on the cohesive and adhesive forces between the liquid molecules and the container surface. Different liquids will have different interactions with the container, leading to varying meniscus heights.
A graduated cylinder or a buret must be read at the meniscus, which is the curved surface of a liquid in a container. Reading at the bottom of the meniscus helps to minimize parallax error and ensures a more accurate measurement.
You do not see a meniscus in Diagram C, as the liquid surface is flat and level with no curvature at the edges.
Reading at the lower meniscus means taking the measurement from the bottom of the curved surface of a liquid in a graduated cylinder or similar container. This is done to ensure an accurate measurement by avoiding the distortion caused by surface tension that can occur at the top of the meniscus.
As the diameter of the container decreases, the meniscus becomes more pronounced. The meniscus may be convex (curving upward) or concave (curving downward). Most of the time you will find that the meniscus is concave. The most notable exception is the meniscus that forms from mercury. When taking measurement readings it is important that the reading is done properly. The following rules must be adhered to: I. Read the meniscus at eye level. Do not read the meniscus from above or below eye level. Significant measurement errors may occur II. Read the bottom of a concave meniscus and the top of a convex meniscus.
A meniscus, but whether it has a positive curve or a negative one depends on whether it wets the glass.
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It's called Ya Mum's Panis
Water's meniscus curves up. Mercury's meniscus curves down.
You measure from the bottom curve of the meniscus.
Meniscus
The meniscus - the upward curve of a liquid in a narrow vessel.Read more: When_water_is_ina_container_the_surface_of_the_water_is_curved_this_curve_is_called
You measure at the bottom of the meniscus.
Omobranchus meniscus was created in 1975.
Mercury's meniscus curves down. Water's meniscus curves up.