A fluid is a defined as substance that can flow. that doesn’t maintain a fixed shape. Gases and liquids are usually considered fluids. Any object, whether a solid, a gas, a liquid, or a plasma (a collection of ionized particles), has a density.
The density is defined as the mass per unit volume and is given the Greek symbol rho (r). So the density is defined as r = m/V. (kg/m3)
A substance which is more dense will have more mass for a given volume. If I hold a cubic centimeter of lead, it will be heavier than a cubic centimeter of wood because lead has a higher density than wood. gives the density of some materials.
Another way of specifying the density of an object is to compare its density to
the density of water at 4.0°C, (which is 1.00 ´ 103 kg/m3). The specific gravity is defined as the ratio of the density of a substance to the density of
Fluid mechanics is the study of fluids and the forces on them. (Fluids include liquids, gases, and plasmas.) Fluid mechanics can be divided into:
ü Fluid statics: the study of fluids at rest.
ü Fluid kinematics: the study of fluids in motion, and
ü Fluid dynamics: the study of the effect of forces on fluid motion. In this case, we will only deal with fluids in motion
- Teacher: Emmanuel TUYISHIME