Fluid Mechanics Flashcards
Substances that flow under the influence of external forces.
Fluids
What are the two types of fluids?
Liquid and gas
It is when molecules move around due to the weak intermolecular forces that are significant enough to keep them together.
Liquid
They spread out to take the shape of their container
Liquid
The intermolecular forces binding them are almost negligible, so the distance between the molecules is widely spaced.
Gas
Mass per unit volume of substance that is denoted by “rho”
Mass density
It is used to identify materials considering the ratio of density of substance to density of the reference material (usually water at 4 °C or air)
Specific gravity
It is the physical quantity that describes how much force pressing against a surface is exerted on each unit of area.
Pressure
What are the two kinds of pressure?
Water and air pressure
In water pressure,
As the water ___, the pressure ___ since there is more pressure below
Increases, decreases
In air pressure,
The higher the ___, the higher the ___
Temperature, pressure
Air pressure is also known as?
Atmospheric pressure
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In pressure,
Large areas distribute weight to larger areas which leads to the lessening of stress.
