What causes a meniscus in liquids?

Why a meniscus occurs Water molecules are attracted to the molecules in the wall of the glass beaker. And since water molecules like to stick together, when the molecules touching the glass cling to it, other water molecules cling to the molecules touching the glass, forming the meniscus.

Why do you base your reading on the lower meniscus in getting the volume of liquid water?

The curvature of a meniscus is related to the surface tension of the liquid and inversely related to the diameter of the tubing in which it is formed. When reading any meniscus, it is important to ascertain that it is in an equilibrium position.

Why upper meniscus is used for Coloured fluids?

A meniscus is the curvature of the surface of the water. However, in the case of coloured liquids observing this phase boundary (spatial interface, called a phase boundary) is not possible, hence only the upper meniscus is considered.

What is a meniscus and how is it used in liquid measure?

A concave surface of a liquid resulting from surface tension. The bottom of the meniscus is used to measure the volume of a liquid in apparatus such as a graduated cylinder.

Does a meniscus tear cause fluid on the knee?

Secondary effects. A torn meniscus often causes the knee to make extra joint fluid. There is more room in the knee for fluid when the knee is slightly bent. Therefore, people with chronic swelling tend to hold the involved knee in a bent position and develop hamstring tightness and joint contracture.

What about the colored liquid is it still applicable to read the lower meniscus?

This is due to the reason that in case of coloured solutions lower meniscus is not visible clearly. In the case of colourless liquid, it is easy to observe the phase boundary, whether it is convex or concave hence in the colourless liquid lower meniscus may be considered.

Will fluid on the knee go away on its own?

Knee swelling occurs when excess fluid accumulates on or around the knee joints. Doctors call this an effusion, and some people call it water on the knee. Sometimes, swelling (and the pain that accompanies it) will go away with home treatments. Other times, it may require visiting a doctor for medical treatment.