Liquid
From Wikipedia, the free encyclopedia
 |
This article is missing citations, it needs proof that it is true. Using citations helps stop the breaking of copyright and untrue statements. |
A liquid is a form of matter that has an almost-fixed volume but no set shape.
Every small force makes a liquid change its shape by flowing. Because of that gravity makes liquids always take the shape of the container.
Fluids that flow slowly have a high viscosity. Some fluids like tar have such a high viscosity that they may seem solid.
It is very difficult to compress a liquid.
A liquid is one of the four most common states of matter. Examples of liquid are water or oils. Your blood is a liquid too.
If a liquid is at rest in a uniform gravitational field, the pressure p at any point is given by
- p = ρgz
where ρ is the density of the liquid (assumed constant) and z is the depth of the point below the surface. Note that this formula assumes that the pressure at the free surface is zero.
|
|||||||
