Solids and Fluids
Matter:
Anything that has mass and takes up space.
Crystalline:
Solids with ordered atom-structure and fixed melting point.
Amorphous:
Solids with in ordered atom-structure and without melting point.
Young’s modulus:
Ratio of stress to strain when solids is under tension.
Shear modulus:
Ratio of stress to strain when solids is under shear.
Bulk modulus:
Ratio of stress to strain when solids is under hydraulic pressure.
Buoyancy:
The force caused by pressure variation with depth to lift immersed
objects.
Surface tension:
The force to attract surfaced molecular to make the surface area of
fluid as small as possible.
Capillary action:
The phenomena of fluids automatically raising in open-ended tubes.
Continuity:
The net rate of flow of mass inward across any closed surface is
equal to the rate of increase of the mass within the surface.
Viscosity:
The inter-friction mechanism in fluid to dissipate energy.
Laminar flow:
Every particle passing a particular point moves exactly along the
smooth path followed by particles passing that point early.
Turbulent flow:
The irregular flow when the velocity of the flow is high.
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